Merge pull request #3716

a2b557f 6795bd0 209ec96 ed2c81e a830db2 57ea902 31a895e ba8331c f7f1917 41be339 f025ae9 ef2cb63 dcfd299 5d3e702 2704624 2771a18 0e4c7d0 (moneromooo-monero)

21 files changed, 677 insertions, 455 deletions

diff --git a/src/blockchain_utilities/blockchain_import.cpp b/src/blockchain_utilities/blockchain_import.cpp
index a58257719..c76641598 100644
--- a/src/blockchain_utilities/blockchain_import.cpp
+++ b/src/blockchain_utilities/blockchain_import.cpp
@@ -164,7 +164,7 @@ int pop_blocks(cryptonote::core& core, int num_blocks)
   return num_blocks;
 }
 
-int check_flush(cryptonote::core &core, std::list<block_complete_entry> &blocks, bool force)
+int check_flush(cryptonote::core &core, std::vector<block_complete_entry> &blocks, bool force)
 {
   if (blocks.empty())
     return 0;
@@ -176,7 +176,7 @@ int check_flush(cryptonote::core &core, std::list<block_complete_entry> &blocks,
   if (!force && new_height % HASH_OF_HASHES_STEP)
     return 0;
 
-  std::list<crypto::hash> hashes;
+  std::vector<crypto::hash> hashes;
   for (const auto &b: blocks)
   {
     cryptonote::block block;
@@ -312,7 +312,7 @@ int import_from_file(cryptonote::core& core, const std::string& import_file_path
   MINFO("Reading blockchain from bootstrap file...");
   std::cout << ENDL;
 
-  std::list<block_complete_entry> blocks;
+  std::vector<block_complete_entry> blocks;
 
   // Skip to start_height before we start adding.
   {
@@ -437,7 +437,7 @@ int import_from_file(cryptonote::core& core, const std::string& import_file_path
         {
           cryptonote::blobdata block;
           cryptonote::block_to_blob(bp.block, block);
-          std::list<cryptonote::blobdata> txs;
+          std::vector<cryptonote::blobdata> txs;
           for (const auto &tx: bp.txs)
           {
             txs.push_back(cryptonote::blobdata());
diff --git a/src/common/threadpool.cpp b/src/common/threadpool.cpp
index fb238dca7..6b69e2a12 100644
--- a/src/common/threadpool.cpp
+++ b/src/common/threadpool.cpp
@@ -36,6 +36,7 @@
 #include "common/util.h"
 
 static __thread int depth = 0;
+static __thread bool is_leaf = false;
 
 namespace tools
 {
@@ -43,9 +44,9 @@ threadpool::threadpool(unsigned int max_threads) : running(true), active(0) {
   boost::thread::attributes attrs;
   attrs.set_stack_size(THREAD_STACK_SIZE);
   max = max_threads ? max_threads : tools::get_max_concurrency();
-  unsigned int i = max;
+  size_t i = max ? max - 1 : 0;
   while(i--) {
-    threads.push_back(boost::thread(attrs, boost::bind(&threadpool::run, this)));
+    threads.push_back(boost::thread(attrs, boost::bind(&threadpool::run, this, false)));
   }
 }
 
@@ -60,20 +61,25 @@ threadpool::~threadpool() {
   }
 }
 
-void threadpool::submit(waiter *obj, std::function<void()> f) {
-  entry e = {obj, f};
+void threadpool::submit(waiter *obj, std::function<void()> f, bool leaf) {
+  CHECK_AND_ASSERT_THROW_MES(!is_leaf, "A leaf routine is using a thread pool");
   boost::unique_lock<boost::mutex> lock(mutex);
-  if ((active == max && !queue.empty()) || depth > 0) {
+  if (!leaf && ((active == max && !queue.empty()) || depth > 0)) {
     // if all available threads are already running
     // and there's work waiting, just run in current thread
     lock.unlock();
     ++depth;
+    is_leaf = leaf;
     f();
     --depth;
+    is_leaf = false;
   } else {
     if (obj)
       obj->inc();
-    queue.push_back(e);
+    if (leaf)
+      queue.push_front({obj, f, leaf});
+    else
+      queue.push_back({obj, f, leaf});
     has_work.notify_one();
   }
 }
@@ -91,7 +97,7 @@ threadpool::waiter::~waiter()
   }
   try
   {
-    wait();
+    wait(NULL);
   }
   catch (const std::exception &e)
   {
@@ -99,9 +105,12 @@ threadpool::waiter::~waiter()
   }
 }
 
-void threadpool::waiter::wait() {
+void threadpool::waiter::wait(threadpool *tpool) {
+  if (tpool)
+    tpool->run(true);
   boost::unique_lock<boost::mutex> lock(mt);
-  while(num) cv.wait(lock);
+  while(num)
+    cv.wait(lock);
 }
 
 void threadpool::waiter::inc() {
@@ -113,15 +122,19 @@ void threadpool::waiter::dec() {
   const boost::unique_lock<boost::mutex> lock(mt);
   num--;
   if (!num)
-    cv.notify_one();
+    cv.notify_all();
 }
 
-void threadpool::run() {
+void threadpool::run(bool flush) {
   boost::unique_lock<boost::mutex> lock(mutex);
   while (running) {
     entry e;
     while(queue.empty() && running)
+    {
+      if (flush)
+        return;
       has_work.wait(lock);
+    }
     if (!running) break;
 
     active++;
@@ -129,8 +142,10 @@ void threadpool::run() {
     queue.pop_front();
     lock.unlock();
     ++depth;
+    is_leaf = e.leaf;
     e.f();
     --depth;
+    is_leaf = false;
 
     if (e.wo)
       e.wo->dec();
diff --git a/src/common/threadpool.h b/src/common/threadpool.h
index bf80a87f6..a43e38a76 100644
--- a/src/common/threadpool.h
+++ b/src/common/threadpool.h
@@ -59,7 +59,7 @@ public:
     public:
     void inc();
     void dec();
-    void wait();  //! Wait for a set of tasks to finish.
+    void wait(threadpool *tpool);  //! Wait for a set of tasks to finish.
     waiter() : num(0){}
     ~waiter();
   };
@@ -67,7 +67,7 @@ public:
   // Submit a task to the pool. The waiter pointer may be
   // NULL if the caller doesn't care to wait for the
   // task to finish.
-  void submit(waiter *waiter, std::function<void()> f);
+  void submit(waiter *waiter, std::function<void()> f, bool leaf = false);
 
   unsigned int get_max_concurrency() const;
 
@@ -78,6 +78,7 @@ public:
     typedef struct entry {
       waiter *wo;
       std::function<void()> f;
+      bool leaf;
     } entry;
     std::deque<entry> queue;
     boost::condition_variable has_work;
@@ -86,7 +87,7 @@ public:
     unsigned int active;
     unsigned int max;
     bool running;
-    void run();
+    void run(bool flush = false);
 };
 
 }
diff --git a/src/cryptonote_basic/connection_context.h b/src/cryptonote_basic/connection_context.h
index 3f4651565..eb73ab0ea 100644
--- a/src/cryptonote_basic/connection_context.h
+++ b/src/cryptonote_basic/connection_context.h
@@ -52,7 +52,7 @@ namespace cryptonote
     };
 
     state m_state;
-    std::list<crypto::hash> m_needed_objects;
+    std::vector<crypto::hash> m_needed_objects;
     std::unordered_set<crypto::hash> m_requested_objects;
     uint64_t m_remote_blockchain_height;
     uint64_t m_last_response_height;
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 78f61766f..1eda2cbb0 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -242,6 +242,7 @@ bool Blockchain::scan_outputkeys_for_indexes(size_t tx_version, const txin_to_ke
       MDEBUG("Additional outputs needed: " << absolute_offsets.size() - outputs.size());
       std::vector < uint64_t > add_offsets;
       std::vector<output_data_t> add_outputs;
+      add_outputs.reserve(absolute_offsets.size() - outputs.size());
       for (size_t i = outputs.size(); i < absolute_offsets.size(); i++)
         add_offsets.push_back(absolute_offsets[i]);
       try
@@ -850,6 +851,11 @@ difficulty_type Blockchain::get_difficulty_for_next_block()
 
     timestamps.clear();
     difficulties.clear();
+    if (height > offset)
+    {
+      timestamps.reserve(height - offset);
+      difficulties.reserve(height - offset);
+    }
     for (; offset < height; offset++)
     {
       timestamps.push_back(m_db->get_block_timestamp(offset));
@@ -1170,6 +1176,7 @@ void Blockchain::get_last_n_blocks_sizes(std::vector<size_t>& sz, size_t count)
   m_db->block_txn_start(true);
   // add size of last <count> blocks to vector <sz> (or less, if blockchain size < count)
   size_t start_offset = h - std::min<size_t>(h, count);
+  sz.reserve(sz.size() + h - start_offset);
   for(size_t i = start_offset; i < h; i++)
   {
     sz.push_back(m_db->get_block_size(i));
@@ -1367,6 +1374,7 @@ bool Blockchain::complete_timestamps_vector(uint64_t start_top_height, std::vect
   size_t need_elements = BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW - timestamps.size();
   CHECK_AND_ASSERT_MES(start_top_height < m_db->height(), false, "internal error: passed start_height not < " << " m_db->height() -- " << start_top_height << " >= " << m_db->height());
   size_t stop_offset = start_top_height > need_elements ? start_top_height - need_elements : 0;
+  timestamps.reserve(timestamps.size() + start_top_height - stop_offset);
   while (start_top_height != stop_offset)
   {
     timestamps.push_back(m_db->get_block_timestamp(start_top_height));
@@ -1566,7 +1574,7 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
   return true;
 }
 //------------------------------------------------------------------
-bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const
+bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks, std::vector<cryptonote::blobdata>& txs) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -1580,7 +1588,7 @@ bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<std::
 
   for(const auto& blk : blocks)
   {
-    std::list<crypto::hash> missed_ids;
+    std::vector<crypto::hash> missed_ids;
     get_transactions_blobs(blk.second.tx_hashes, txs, missed_ids);
     CHECK_AND_ASSERT_MES(!missed_ids.size(), false, "has missed transactions in own block in main blockchain");
   }
@@ -1588,14 +1596,16 @@ bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<std::
   return true;
 }
 //------------------------------------------------------------------
-bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const
+bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
-  if(start_offset >= m_db->height())
+  const uint64_t height = m_db->height();
+  if(start_offset >= height)
     return false;
 
-  for(size_t i = start_offset; i < start_offset + count && i < m_db->height();i++)
+  blocks.reserve(blocks.size() + height - start_offset);
+  for(size_t i = start_offset; i < start_offset + count && i < height;i++)
   {
     blocks.push_back(std::make_pair(m_db->get_block_blob_from_height(i), block()));
     if (!parse_and_validate_block_from_blob(blocks.back().first, blocks.back().second))
@@ -1620,17 +1630,20 @@ bool Blockchain::handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NO
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
   m_db->block_txn_start(true);
   rsp.current_blockchain_height = get_current_blockchain_height();
-  std::list<std::pair<cryptonote::blobdata,block>> blocks;
+  std::vector<std::pair<cryptonote::blobdata,block>> blocks;
   get_blocks(arg.blocks, blocks, rsp.missed_ids);
 
-  for (const auto& bl: blocks)
+  for (auto& bl: blocks)
   {
-    std::list<crypto::hash> missed_tx_ids;
-    std::list<cryptonote::blobdata> txs;
+    std::vector<crypto::hash> missed_tx_ids;
+    std::vector<cryptonote::blobdata> txs;
+
+    rsp.blocks.push_back(block_complete_entry());
+    block_complete_entry& e = rsp.blocks.back();
 
     // FIXME: s/rsp.missed_ids/missed_tx_id/ ?  Seems like rsp.missed_ids
     //        is for missed blocks, not missed transactions as well.
-    get_transactions_blobs(bl.second.tx_hashes, txs, missed_tx_ids);
+    get_transactions_blobs(bl.second.tx_hashes, e.txs, missed_tx_ids);
 
     if (missed_tx_ids.size() != 0)
     {
@@ -1642,35 +1655,28 @@ bool Blockchain::handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NO
       // append missed transaction hashes to response missed_ids field,
       // as done below if any standalone transactions were requested
       // and missed.
-      rsp.missed_ids.splice(rsp.missed_ids.end(), missed_tx_ids);
-	  m_db->block_txn_stop();
+      rsp.missed_ids.insert(rsp.missed_ids.end(), missed_tx_ids.begin(), missed_tx_ids.end());
+      m_db->block_txn_stop();
       return false;
     }
 
-    rsp.blocks.push_back(block_complete_entry());
-    block_complete_entry& e = rsp.blocks.back();
     //pack block
-    e.block = bl.first;
-    //pack transactions
-    for (const cryptonote::blobdata& tx: txs)
-      e.txs.push_back(tx);
-  }
-  //get another transactions, if need
-  std::list<cryptonote::blobdata> txs;
-  get_transactions_blobs(arg.txs, txs, rsp.missed_ids);
-  //pack aside transactions
-  for (const auto& tx: txs)
-    rsp.txs.push_back(tx);
+    e.block = std::move(bl.first);
+  }
+  //get and pack other transactions, if needed
+  std::vector<cryptonote::blobdata> txs;
+  get_transactions_blobs(arg.txs, rsp.txs, rsp.missed_ids);
 
   m_db->block_txn_stop();
   return true;
 }
 //------------------------------------------------------------------
-bool Blockchain::get_alternative_blocks(std::list<block>& blocks) const
+bool Blockchain::get_alternative_blocks(std::vector<block>& blocks) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
 
+  blocks.reserve(m_alternative_chains.size());
   for (const auto& alt_bl: m_alternative_chains)
   {
     blocks.push_back(alt_bl.second.bl);
@@ -2090,6 +2096,9 @@ uint64_t Blockchain::block_difficulty(uint64_t i) const
   return 0;
 }
 //------------------------------------------------------------------
+template<typename T> void reserve_container(std::vector<T> &v, size_t N) { v.reserve(N); }
+template<typename T> void reserve_container(std::list<T> &v, size_t N) { }
+//------------------------------------------------------------------
 //TODO: return type should be void, throw on exception
 //       alternatively, return true only if no blocks missed
 template<class t_ids_container, class t_blocks_container, class t_missed_container>
@@ -2098,6 +2107,7 @@ bool Blockchain::get_blocks(const t_ids_container& block_ids, t_blocks_container
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
 
+  reserve_container(blocks, block_ids.size());
   for (const auto& block_hash : block_ids)
   {
     try
@@ -2132,6 +2142,7 @@ bool Blockchain::get_transactions_blobs(const t_ids_container& txs_ids, t_tx_con
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
 
+  reserve_container(txs, txs_ids.size());
   for (const auto& tx_hash : txs_ids)
   {
     try
@@ -2158,6 +2169,7 @@ bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
 
+  reserve_container(txs, txs_ids.size());
   for (const auto& tx_hash : txs_ids)
   {
     try
@@ -2186,7 +2198,7 @@ bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container
 // Find the split point between us and foreign blockchain and return
 // (by reference) the most recent common block hash along with up to
 // BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT additional (more recent) hashes.
-bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::list<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const
+bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::vector<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -2200,6 +2212,7 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
   m_db->block_txn_start(true);
   current_height = get_current_blockchain_height();
   size_t count = 0;
+  hashes.reserve(std::max((size_t)(current_height - start_height), (size_t)BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT));
   for(size_t i = start_height; i < current_height && count < BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT; i++, count++)
   {
     hashes.push_back(m_db->get_block_hash_from_height(i));
@@ -2224,7 +2237,7 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
 // find split point between ours and foreign blockchain (or start at
 // blockchain height <req_start_block>), and return up to max_count FULL
 // blocks by reference.
-bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, size_t max_count) const
+bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_count) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -2250,18 +2263,28 @@ bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, cons
   m_db->block_txn_start(true);
   total_height = get_current_blockchain_height();
   size_t count = 0, size = 0;
+  blocks.reserve(std::min(std::min(max_count, (size_t)10000), (size_t)(total_height - start_height)));
   for(size_t i = start_height; i < total_height && count < max_count && (size < FIND_BLOCKCHAIN_SUPPLEMENT_MAX_SIZE || count < 3); i++, count++)
   {
     blocks.resize(blocks.size()+1);
-    blocks.back().first = m_db->get_block_blob_from_height(i);
+    blocks.back().first.first = m_db->get_block_blob_from_height(i);
     block b;
-    CHECK_AND_ASSERT_MES(parse_and_validate_block_from_blob(blocks.back().first, b), false, "internal error, invalid block");
-    std::list<crypto::hash> mis;
-    get_transactions_blobs(b.tx_hashes, blocks.back().second, mis, pruned);
+    CHECK_AND_ASSERT_MES(parse_and_validate_block_from_blob(blocks.back().first.first, b), false, "internal error, invalid block");
+    blocks.back().first.second = get_miner_tx_hash ? cryptonote::get_transaction_hash(b.miner_tx) : crypto::null_hash;
+    std::vector<crypto::hash> mis;
+    std::vector<cryptonote::blobdata> txs;
+    get_transactions_blobs(b.tx_hashes, txs, mis, pruned);
     CHECK_AND_ASSERT_MES(!mis.size(), false, "internal error, transaction from block not found");
-    size += blocks.back().first.size();
-    for (const auto &t: blocks.back().second)
+    size += blocks.back().first.first.size();
+    for (const auto &t: txs)
       size += t.size();
+
+    CHECK_AND_ASSERT_MES(txs.size() == b.tx_hashes.size(), false, "mismatched sizes of b.tx_hashes and txs");
+    blocks.back().second.reserve(txs.size());
+    for (size_t i = 0; i < txs.size(); ++i)
+    {
+      blocks.back().second.push_back(std::make_pair(b.tx_hashes[i], std::move(txs[i])));
+    }
   }
   m_db->block_txn_stop();
   return true;
@@ -2795,7 +2818,7 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
       {
         // ND: Speedup
         // 1. Thread ring signature verification if possible.
-        tpool.submit(&waiter, boost::bind(&Blockchain::check_ring_signature, this, std::cref(tx_prefix_hash), std::cref(in_to_key.k_image), std::cref(pubkeys[sig_index]), std::cref(tx.signatures[sig_index]), std::ref(results[sig_index])));
+        tpool.submit(&waiter, boost::bind(&Blockchain::check_ring_signature, this, std::cref(tx_prefix_hash), std::cref(in_to_key.k_image), std::cref(pubkeys[sig_index]), std::cref(tx.signatures[sig_index]), std::ref(results[sig_index])), true);
       }
       else
       {
@@ -2819,7 +2842,7 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
     sig_index++;
   }
   if (tx.version == 1 && threads > 1)
-    waiter.wait();
+    waiter.wait(&tpool);
 
   if (tx.version == 1)
   {
@@ -2991,6 +3014,7 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
 void Blockchain::check_ring_signature(const crypto::hash &tx_prefix_hash, const crypto::key_image &key_image, const std::vector<rct::ctkey> &pubkeys, const std::vector<crypto::signature>& sig, uint64_t &result)
 {
   std::vector<const crypto::public_key *> p_output_keys;
+  p_output_keys.reserve(pubkeys.size());
   for (auto &key : pubkeys)
   {
     // rct::key and crypto::public_key have the same structure, avoid object ctor/memcpy
@@ -3087,6 +3111,7 @@ uint64_t Blockchain::get_dynamic_per_kb_fee_estimate(uint64_t grace_blocks) cons
   const uint64_t min_block_size = get_min_block_size(version);
   std::vector<size_t> sz;
   get_last_n_blocks_sizes(sz, CRYPTONOTE_REWARD_BLOCKS_WINDOW - grace_blocks);
+  sz.reserve(grace_blocks);
   for (size_t i = 0; i < grace_blocks; ++i)
     sz.push_back(min_block_size);
 
@@ -3244,6 +3269,7 @@ bool Blockchain::check_block_timestamp(const block& b, uint64_t& median_ts) cons
 
   // need most recent 60 blocks, get index of first of those
   size_t offset = h - BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW;
+  timestamps.reserve(h - offset);
   for(;offset < h; ++offset)
   {
     timestamps.push_back(m_db->get_block_timestamp(offset));
@@ -3270,7 +3296,7 @@ void Blockchain::return_tx_to_pool(std::vector<transaction> &txs)
   }
 }
 //------------------------------------------------------------------
-bool Blockchain::flush_txes_from_pool(const std::list<crypto::hash> &txids)
+bool Blockchain::flush_txes_from_pool(const std::vector<crypto::hash> &txids)
 {
   CRITICAL_REGION_LOCAL(m_tx_pool);
 
@@ -3460,6 +3486,7 @@ leave:
   // Iterate over the block's transaction hashes, grabbing each
   // from the tx_pool and validating them.  Each is then added
   // to txs.  Keys spent in each are added to <keys> by the double spend check.
+  txs.reserve(bl.tx_hashes.size());
   for (const crypto::hash& tx_id : bl.tx_hashes)
   {
     transaction tx;
@@ -3873,7 +3900,7 @@ void Blockchain::output_scan_worker(const uint64_t amount, const std::vector<uin
   }
 }
 
-uint64_t Blockchain::prevalidate_block_hashes(uint64_t height, const std::list<crypto::hash> &hashes)
+uint64_t Blockchain::prevalidate_block_hashes(uint64_t height, const std::vector<crypto::hash> &hashes)
 {
   // new: . . . . . X X X X X . . . . . .
   // pre: A A A A B B B B C C C C D D D D
@@ -3976,7 +4003,7 @@ uint64_t Blockchain::prevalidate_block_hashes(uint64_t height, const std::list<c
 //    vs [k_image, output_keys] (m_scan_table). This is faster because it takes advantage of bulk queries
 //    and is threaded if possible. The table (m_scan_table) will be used later when querying output
 //    keys.
-bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_entry> &blocks_entry)
+bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete_entry> &blocks_entry)
 {
   MTRACE("Blockchain::" << __func__);
   TIME_MEASURE_START(prepare);
@@ -4042,6 +4069,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
 
     for (uint64_t i = 0; i < threads; i++)
     {
+      blocks[i].reserve(batches + 1);
       for (int j = 0; j < batches; j++)
       {
         block block;
@@ -4100,11 +4128,11 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
       tools::threadpool::waiter waiter;
       for (uint64_t i = 0; i < threads; i++)
       {
-        tpool.submit(&waiter, boost::bind(&Blockchain::block_longhash_worker, this, thread_height, std::cref(blocks[i]), std::ref(maps[i])));
+        tpool.submit(&waiter, boost::bind(&Blockchain::block_longhash_worker, this, thread_height, std::cref(blocks[i]), std::ref(maps[i])), true);
         thread_height += blocks[i].size();
       }
 
-      waiter.wait();
+      waiter.wait(&tpool);
 
       if (m_cancel)
          return false;
@@ -4239,9 +4267,9 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
     for (size_t i = 0; i < amounts.size(); i++)
     {
       uint64_t amount = amounts[i];
-      tpool.submit(&waiter, boost::bind(&Blockchain::output_scan_worker, this, amount, std::cref(offset_map[amount]), std::ref(tx_map[amount]), std::ref(transactions[i])));
+      tpool.submit(&waiter, boost::bind(&Blockchain::output_scan_worker, this, amount, std::cref(offset_map[amount]), std::ref(tx_map[amount]), std::ref(transactions[i])), true);
     }
-    waiter.wait();
+    waiter.wait(&tpool);
   }
   else
   {
@@ -4505,7 +4533,7 @@ void Blockchain::load_compiled_in_block_hashes()
         // for tx hashes will fail in handle_block_to_main_chain(..)
         CRITICAL_REGION_LOCAL(m_tx_pool);
 
-        std::list<transaction> txs;
+        std::vector<transaction> txs;
         m_tx_pool.get_transactions(txs);
 
         size_t blob_size;
@@ -4568,6 +4596,6 @@ bool Blockchain::for_all_outputs(uint64_t amount, std::function<bool(uint64_t he
 }
 
 namespace cryptonote {
-template bool Blockchain::get_transactions(const std::vector<crypto::hash>&, std::list<transaction>&, std::list<crypto::hash>&) const;
-template bool Blockchain::get_transactions_blobs(const std::vector<crypto::hash>&, std::list<cryptonote::blobdata>&, std::list<crypto::hash>&, bool) const;
+template bool Blockchain::get_transactions(const std::vector<crypto::hash>&, std::vector<transaction>&, std::vector<crypto::hash>&) const;
+template bool Blockchain::get_transactions_blobs(const std::vector<crypto::hash>&, std::vector<cryptonote::blobdata>&, std::vector<crypto::hash>&, bool) const;
 }
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index ef736d1e7..36d6b8609 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -157,7 +157,7 @@ namespace cryptonote
      *
      * @return false if start_offset > blockchain height, else true
      */
-    bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const;
+    bool get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks, std::vector<cryptonote::blobdata>& txs) const;
 
     /**
      * @brief get blocks from blocks based on start height and count
@@ -168,7 +168,7 @@ namespace cryptonote
      *
      * @return false if start_offset > blockchain height, else true
      */
-    bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const;
+    bool get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks) const;
 
     /**
      * @brief compiles a list of all blocks stored as alternative chains
@@ -177,7 +177,7 @@ namespace cryptonote
      *
      * @return true
      */
-    bool get_alternative_blocks(std::list<block>& blocks) const;
+    bool get_alternative_blocks(std::vector<block>& blocks) const;
 
     /**
      * @brief returns the number of alternative blocks stored
@@ -213,7 +213,7 @@ namespace cryptonote
      *
      * @return false on erroneous blocks, else true
      */
-    bool prepare_handle_incoming_blocks(const std::list<block_complete_entry>  &blocks);
+    bool prepare_handle_incoming_blocks(const std::vector<block_complete_entry>  &blocks);
 
     /**
      * @brief incoming blocks post-processing, cleanup, and disk sync
@@ -373,7 +373,7 @@ namespace cryptonote
      *
      * @return true if a block found in common, else false
      */
-    bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::list<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const;
+    bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, std::vector<crypto::hash>& hashes, uint64_t& start_height, uint64_t& current_height) const;
 
     /**
      * @brief get recent block hashes for a foreign chain
@@ -420,7 +420,7 @@ namespace cryptonote
      *
      * @return true if a block found in common or req_start_block specified, else false
      */
-    bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, size_t max_count) const;
+    bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_count) const;
 
     /**
      * @brief retrieves a set of blocks and their transactions, and possibly other transactions
@@ -829,7 +829,7 @@ namespace cryptonote
      *
      * @return false if any removals fail, otherwise true
      */
-    bool flush_txes_from_pool(const std::list<crypto::hash> &txids);
+    bool flush_txes_from_pool(const std::vector<crypto::hash> &txids);
 
     /**
      * @brief return a histogram of outputs on the blockchain
@@ -952,7 +952,7 @@ namespace cryptonote
 
     bool is_within_compiled_block_hash_area(uint64_t height) const;
     bool is_within_compiled_block_hash_area() const { return is_within_compiled_block_hash_area(m_db->height()); }
-    uint64_t prevalidate_block_hashes(uint64_t height, const std::list<crypto::hash> &hashes);
+    uint64_t prevalidate_block_hashes(uint64_t height, const std::vector<crypto::hash> &hashes);
 
     void lock();
     void unlock();
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index 7fc81a87d..910bf0c1f 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -323,19 +323,19 @@ namespace cryptonote
     top_id = m_blockchain_storage.get_tail_id(height);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const
+  bool core::get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks, std::vector<cryptonote::blobdata>& txs) const
   {
     return m_blockchain_storage.get_blocks(start_offset, count, blocks, txs);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const
+  bool core::get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks) const
   {
     return m_blockchain_storage.get_blocks(start_offset, count, blocks);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const
+  bool core::get_blocks(uint64_t start_offset, size_t count, std::vector<block>& blocks) const
   {
-    std::list<std::pair<cryptonote::blobdata, cryptonote::block>> bs;
+    std::vector<std::pair<cryptonote::blobdata, cryptonote::block>> bs;
     if (!m_blockchain_storage.get_blocks(start_offset, count, bs))
       return false;
     for (const auto &b: bs)
@@ -343,7 +343,7 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<cryptonote::blobdata>& txs, std::list<crypto::hash>& missed_txs) const
+  bool core::get_transactions(const std::vector<crypto::hash>& txs_ids, std::vector<cryptonote::blobdata>& txs, std::vector<crypto::hash>& missed_txs) const
   {
     return m_blockchain_storage.get_transactions_blobs(txs_ids, txs, missed_txs);
   }
@@ -354,12 +354,12 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<transaction>& txs, std::list<crypto::hash>& missed_txs) const
+  bool core::get_transactions(const std::vector<crypto::hash>& txs_ids, std::vector<transaction>& txs, std::vector<crypto::hash>& missed_txs) const
   {
     return m_blockchain_storage.get_transactions(txs_ids, txs, missed_txs);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_alternative_blocks(std::list<block>& blocks) const
+  bool core::get_alternative_blocks(std::vector<block>& blocks) const
   {
     return m_blockchain_storage.get_alternative_blocks(blocks);
   }
@@ -672,7 +672,7 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::handle_incoming_txs(const std::list<blobdata>& tx_blobs, std::vector<tx_verification_context>& tvc, bool keeped_by_block, bool relayed, bool do_not_relay)
+  bool core::handle_incoming_txs(const std::vector<blobdata>& tx_blobs, std::vector<tx_verification_context>& tvc, bool keeped_by_block, bool relayed, bool do_not_relay)
   {
     TRY_ENTRY();
     CRITICAL_REGION_LOCAL(m_incoming_tx_lock);
@@ -683,7 +683,7 @@ namespace cryptonote
     tvc.resize(tx_blobs.size());
     tools::threadpool& tpool = tools::threadpool::getInstance();
     tools::threadpool::waiter waiter;
-    std::list<blobdata>::const_iterator it = tx_blobs.begin();
+    std::vector<blobdata>::const_iterator it = tx_blobs.begin();
     for (size_t i = 0; i < tx_blobs.size(); i++, ++it) {
       tpool.submit(&waiter, [&, i, it] {
         try
@@ -697,7 +697,7 @@ namespace cryptonote
         }
       });
     }
-    waiter.wait();
+    waiter.wait(&tpool);
     it = tx_blobs.begin();
     for (size_t i = 0; i < tx_blobs.size(); i++, ++it) {
       if (!results[i].res)
@@ -725,7 +725,7 @@ namespace cryptonote
         });
       }
     }
-    waiter.wait();
+    waiter.wait(&tpool);
 
     bool ok = true;
     it = tx_blobs.begin();
@@ -752,7 +752,7 @@ namespace cryptonote
   //-----------------------------------------------------------------------------------------------
   bool core::handle_incoming_tx(const blobdata& tx_blob, tx_verification_context& tvc, bool keeped_by_block, bool relayed, bool do_not_relay)
   {
-    std::list<cryptonote::blobdata> tx_blobs;
+    std::vector<cryptonote::blobdata> tx_blobs;
     tx_blobs.push_back(tx_blob);
     std::vector<tx_verification_context> tvcv(1);
     bool r = handle_incoming_txs(tx_blobs, tvcv, keeped_by_block, relayed, do_not_relay);
@@ -918,8 +918,8 @@ namespace cryptonote
       const uint64_t end = start_offset + count - 1;
       m_blockchain_storage.for_blocks_range(start_offset, end,
         [this, &emission_amount, &total_fee_amount](uint64_t, const crypto::hash& hash, const block& b){
-      std::list<transaction> txs;
-      std::list<crypto::hash> missed_txs;
+      std::vector<transaction> txs;
+      std::vector<crypto::hash> missed_txs;
       uint64_t coinbase_amount = get_outs_money_amount(b.miner_tx);
       this->get_transactions(b.tx_hashes, txs, missed_txs);      
       uint64_t tx_fee_amount = 0;
@@ -1015,7 +1015,7 @@ namespace cryptonote
   bool core::relay_txpool_transactions()
   {
     // we attempt to relay txes that should be relayed, but were not
-    std::list<std::pair<crypto::hash, cryptonote::blobdata>> txs;
+    std::vector<std::pair<crypto::hash, cryptonote::blobdata>> txs;
     if (m_mempool.get_relayable_transactions(txs) && !txs.empty())
     {
       cryptonote_connection_context fake_context = AUTO_VAL_INIT(fake_context);
@@ -1033,7 +1033,7 @@ namespace cryptonote
   //-----------------------------------------------------------------------------------------------
   void core::on_transaction_relayed(const cryptonote::blobdata& tx_blob)
   {
-    std::list<std::pair<crypto::hash, cryptonote::blobdata>> txs;
+    std::vector<std::pair<crypto::hash, cryptonote::blobdata>> txs;
     cryptonote::transaction tx;
     crypto::hash tx_hash, tx_prefix_hash;
     if (!parse_and_validate_tx_from_blob(tx_blob, tx, tx_hash, tx_prefix_hash))
@@ -1055,9 +1055,9 @@ namespace cryptonote
     return m_blockchain_storage.find_blockchain_supplement(qblock_ids, resp);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, size_t max_count) const
+  bool core::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_count) const
   {
-    return m_blockchain_storage.find_blockchain_supplement(req_start_block, qblock_ids, blocks, total_height, start_height, pruned, max_count);
+    return m_blockchain_storage.find_blockchain_supplement(req_start_block, qblock_ids, blocks, total_height, start_height, pruned, get_miner_tx_hash, max_count);
   }
   //-----------------------------------------------------------------------------------------------
   bool core::get_random_outs_for_amounts(const COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request& req, COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response& res) const
@@ -1112,7 +1112,7 @@ namespace cryptonote
   {
     block_verification_context bvc = boost::value_initialized<block_verification_context>();
     m_miner.pause();
-    std::list<block_complete_entry> blocks;
+    std::vector<block_complete_entry> blocks;
     try
     {
       blocks.push_back(get_block_complete_entry(b, m_mempool));
@@ -1136,8 +1136,8 @@ namespace cryptonote
       cryptonote_connection_context exclude_context = boost::value_initialized<cryptonote_connection_context>();
       NOTIFY_NEW_BLOCK::request arg = AUTO_VAL_INIT(arg);
       arg.current_blockchain_height = m_blockchain_storage.get_current_blockchain_height();
-      std::list<crypto::hash> missed_txs;
-      std::list<cryptonote::blobdata> txs;
+      std::vector<crypto::hash> missed_txs;
+      std::vector<cryptonote::blobdata> txs;
       m_blockchain_storage.get_transactions_blobs(b.tx_hashes, txs, missed_txs);
       if(missed_txs.size() &&  m_blockchain_storage.get_block_id_by_height(get_block_height(b)) != get_block_hash(b))
       {
@@ -1173,7 +1173,7 @@ namespace cryptonote
   }
 
   //-----------------------------------------------------------------------------------------------
-  bool core::prepare_handle_incoming_blocks(const std::list<block_complete_entry> &blocks)
+  bool core::prepare_handle_incoming_blocks(const std::vector<block_complete_entry> &blocks)
   {
     m_incoming_tx_lock.lock();
     m_blockchain_storage.prepare_handle_incoming_blocks(blocks);
@@ -1266,7 +1266,7 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_pool_transactions(std::list<transaction>& txs, bool include_sensitive_data) const
+  bool core::get_pool_transactions(std::vector<transaction>& txs, bool include_sensitive_data) const
   {
     m_mempool.get_transactions(txs, include_sensitive_data);
     return true;
@@ -1554,7 +1554,7 @@ namespace cryptonote
     return m_target_blockchain_height;
   }
   //-----------------------------------------------------------------------------------------------
-  uint64_t core::prevalidate_block_hashes(uint64_t height, const std::list<crypto::hash> &hashes)
+  uint64_t core::prevalidate_block_hashes(uint64_t height, const std::vector<crypto::hash> &hashes)
   {
     return get_blockchain_storage().prevalidate_block_hashes(height, hashes);
   }
diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h
index 91bd50729..03000383e 100644
--- a/src/cryptonote_core/cryptonote_core.h
+++ b/src/cryptonote_core/cryptonote_core.h
@@ -133,7 +133,7 @@ namespace cryptonote
       *
       * @return true if the transactions made it to the transaction pool, otherwise false
       */
-     bool handle_incoming_txs(const std::list<blobdata>& tx_blobs, std::vector<tx_verification_context>& tvc, bool keeped_by_block, bool relayed, bool do_not_relay);
+     bool handle_incoming_txs(const std::vector<blobdata>& tx_blobs, std::vector<tx_verification_context>& tvc, bool keeped_by_block, bool relayed, bool do_not_relay);
 
      /**
       * @brief handles an incoming block
@@ -156,7 +156,7 @@ namespace cryptonote
       *
       * @note see Blockchain::prepare_handle_incoming_blocks
       */
-     bool prepare_handle_incoming_blocks(const std::list<block_complete_entry>  &blocks);
+     bool prepare_handle_incoming_blocks(const std::vector<block_complete_entry>  &blocks);
 
      /**
       * @copydoc Blockchain::cleanup_handle_incoming_blocks
@@ -308,25 +308,25 @@ namespace cryptonote
      void get_blockchain_top(uint64_t& height, crypto::hash& top_id) const;
 
      /**
-      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&, std::list<transaction>&) const
+      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::vector<std::pair<cryptonote::blobdata,block>>&, std::vector<transaction>&) const
       *
-      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&, std::list<transaction>&) const
+      * @note see Blockchain::get_blocks(uint64_t, size_t, std::vector<std::pair<cryptonote::blobdata,block>>&, std::vector<transaction>&) const
       */
-     bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const;
+     bool get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks, std::vector<cryptonote::blobdata>& txs) const;
 
      /**
-      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
+      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::vector<std::pair<cryptonote::blobdata,block>>&) const
       *
-      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
+      * @note see Blockchain::get_blocks(uint64_t, size_t, std::vector<std::pair<cryptonote::blobdata,block>>&) const
       */
-     bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const;
+     bool get_blocks(uint64_t start_offset, size_t count, std::vector<std::pair<cryptonote::blobdata,block>>& blocks) const;
 
      /**
-      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
+      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::vector<std::pair<cryptonote::blobdata,block>>&) const
       *
-      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
+      * @note see Blockchain::get_blocks(uint64_t, size_t, std::vector<std::pair<cryptonote::blobdata,block>>&) const
       */
-     bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const;
+     bool get_blocks(uint64_t start_offset, size_t count, std::vector<block>& blocks) const;
 
      /**
       * @copydoc Blockchain::get_blocks(const t_ids_container&, t_blocks_container&, t_missed_container&) const
@@ -351,14 +351,14 @@ namespace cryptonote
       *
       * @note see Blockchain::get_transactions
       */
-     bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<cryptonote::blobdata>& txs, std::list<crypto::hash>& missed_txs) const;
+     bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::vector<cryptonote::blobdata>& txs, std::vector<crypto::hash>& missed_txs) const;
 
      /**
       * @copydoc Blockchain::get_transactions
       *
       * @note see Blockchain::get_transactions
       */
-     bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<transaction>& txs, std::list<crypto::hash>& missed_txs) const;
+     bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::vector<transaction>& txs, std::vector<crypto::hash>& missed_txs) const;
 
      /**
       * @copydoc Blockchain::get_block_by_hash
@@ -370,9 +370,9 @@ namespace cryptonote
      /**
       * @copydoc Blockchain::get_alternative_blocks
       *
-      * @note see Blockchain::get_alternative_blocks(std::list<block>&) const
+      * @note see Blockchain::get_alternative_blocks(std::vector<block>&) const
       */
-     bool get_alternative_blocks(std::list<block>& blocks) const;
+     bool get_alternative_blocks(std::vector<block>& blocks) const;
 
      /**
       * @copydoc Blockchain::get_alternative_blocks_count
@@ -429,7 +429,7 @@ namespace cryptonote
       *
       * @note see tx_memory_pool::get_transactions
       */
-     bool get_pool_transactions(std::list<transaction>& txs, bool include_unrelayed_txes = true) const;
+     bool get_pool_transactions(std::vector<transaction>& txs, bool include_unrelayed_txes = true) const;
 
      /**
       * @copydoc tx_memory_pool::get_txpool_backlog
@@ -512,11 +512,11 @@ namespace cryptonote
      bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const;
 
      /**
-      * @copydoc Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >&, uint64_t&, uint64_t&, size_t) const
+      * @copydoc Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::vector<std::pair<cryptonote::blobdata, std::vector<cryptonote::blobdata> > >&, uint64_t&, uint64_t&, size_t) const
       *
-      * @note see Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::list<std::pair<cryptonote::blobdata, std::list<transaction> > >&, uint64_t&, uint64_t&, size_t) const
+      * @note see Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::vector<std::pair<cryptonote::blobdata, std::vector<transaction> > >&, uint64_t&, uint64_t&, size_t) const
       */
-     bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, size_t max_count) const;
+     bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > >& blocks, uint64_t& total_height, uint64_t& start_height, bool pruned, bool get_miner_tx_hash, size_t max_count) const;
 
      /**
       * @brief gets some stats about the daemon
@@ -763,7 +763,7 @@ namespace cryptonote
       *
       * @return number of usable blocks
       */
-     uint64_t prevalidate_block_hashes(uint64_t height, const std::list<crypto::hash> &hashes);
+     uint64_t prevalidate_block_hashes(uint64_t height, const std::vector<crypto::hash> &hashes);
 
      /**
       * @brief get free disk space on the blockchain partition
diff --git a/src/cryptonote_core/tx_pool.cpp b/src/cryptonote_core/tx_pool.cpp
index 9df3b458b..8dee2b922 100644
--- a/src/cryptonote_core/tx_pool.cpp
+++ b/src/cryptonote_core/tx_pool.cpp
@@ -558,11 +558,12 @@ namespace cryptonote
   }
   //---------------------------------------------------------------------------------
   //TODO: investigate whether boolean return is appropriate
-  bool tx_memory_pool::get_relayable_transactions(std::list<std::pair<crypto::hash, cryptonote::blobdata>> &txs) const
+  bool tx_memory_pool::get_relayable_transactions(std::vector<std::pair<crypto::hash, cryptonote::blobdata>> &txs) const
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
     const uint64_t now = time(NULL);
+    txs.reserve(m_blockchain.get_txpool_tx_count());
     m_blockchain.for_all_txpool_txes([this, now, &txs](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *){
       // 0 fee transactions are never relayed
       if(meta.fee > 0 && !meta.do_not_relay && now - meta.last_relayed_time > get_relay_delay(now, meta.receive_time))
@@ -590,7 +591,7 @@ namespace cryptonote
     return true;
   }
   //---------------------------------------------------------------------------------
-  void tx_memory_pool::set_relayed(const std::list<std::pair<crypto::hash, cryptonote::blobdata>> &txs)
+  void tx_memory_pool::set_relayed(const std::vector<std::pair<crypto::hash, cryptonote::blobdata>> &txs)
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
@@ -623,10 +624,11 @@ namespace cryptonote
     return m_blockchain.get_txpool_tx_count(include_unrelayed_txes);
   }
   //---------------------------------------------------------------------------------
-  void tx_memory_pool::get_transactions(std::list<transaction>& txs, bool include_unrelayed_txes) const
+  void tx_memory_pool::get_transactions(std::vector<transaction>& txs, bool include_unrelayed_txes) const
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
+    txs.reserve(m_blockchain.get_txpool_tx_count(include_unrelayed_txes));
     m_blockchain.for_all_txpool_txes([&txs](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *bd){
       transaction tx;
       if (!parse_and_validate_tx_from_blob(*bd, tx))
@@ -644,6 +646,7 @@ namespace cryptonote
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
+    txs.reserve(m_blockchain.get_txpool_tx_count(include_unrelayed_txes));
     m_blockchain.for_all_txpool_txes([&txs](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *bd){
       txs.push_back(txid);
       return true;
@@ -655,6 +658,7 @@ namespace cryptonote
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
     const uint64_t now = time(NULL);
+    backlog.reserve(m_blockchain.get_txpool_tx_count(include_unrelayed_txes));
     m_blockchain.for_all_txpool_txes([&backlog, now](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *bd){
       backlog.push_back({meta.blob_size, meta.fee, meta.receive_time - now});
       return true;
@@ -743,6 +747,8 @@ namespace cryptonote
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
+    tx_infos.reserve(m_blockchain.get_txpool_tx_count());
+    key_image_infos.reserve(m_blockchain.get_txpool_tx_count());
     m_blockchain.for_all_txpool_txes([&tx_infos, key_image_infos, include_sensitive_data](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *bd){
       tx_info txi;
       txi.id_hash = epee::string_tools::pod_to_hex(txid);
@@ -813,6 +819,8 @@ namespace cryptonote
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
+    tx_infos.reserve(m_blockchain.get_txpool_tx_count());
+    key_image_infos.reserve(m_blockchain.get_txpool_tx_count());
     m_blockchain.for_all_txpool_txes([&tx_infos, key_image_infos](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *bd){
       cryptonote::rpc::tx_in_pool txi;
       txi.tx_hash = txid;
diff --git a/src/cryptonote_core/tx_pool.h b/src/cryptonote_core/tx_pool.h
index 4ce2f085d..5ccb71196 100644
--- a/src/cryptonote_core/tx_pool.h
+++ b/src/cryptonote_core/tx_pool.h
@@ -237,7 +237,7 @@ namespace cryptonote
      * @param include_unrelayed_txes include unrelayed txes in the result
      *
      */
-    void get_transactions(std::list<transaction>& txs, bool include_unrelayed_txes = true) const;
+    void get_transactions(std::vector<transaction>& txs, bool include_unrelayed_txes = true) const;
 
     /**
      * @brief get a list of all transaction hashes in the pool
@@ -324,14 +324,14 @@ namespace cryptonote
      *
      * @return true
      */
-    bool get_relayable_transactions(std::list<std::pair<crypto::hash, cryptonote::blobdata>>& txs) const;
+    bool get_relayable_transactions(std::vector<std::pair<crypto::hash, cryptonote::blobdata>>& txs) const;
 
     /**
      * @brief tell the pool that certain transactions were just relayed
      *
      * @param txs the list of transactions (and their hashes)
      */
-    void set_relayed(const std::list<std::pair<crypto::hash, cryptonote::blobdata>>& txs);
+    void set_relayed(const std::vector<std::pair<crypto::hash, cryptonote::blobdata>>& txs);
 
     /**
      * @brief get the total number of transactions in the pool
diff --git a/src/cryptonote_protocol/block_queue.cpp b/src/cryptonote_protocol/block_queue.cpp
index 9ae33d540..c39d67ceb 100644
--- a/src/cryptonote_protocol/block_queue.cpp
+++ b/src/cryptonote_protocol/block_queue.cpp
@@ -50,10 +50,10 @@ namespace std {
 namespace cryptonote
 {
 
-void block_queue::add_blocks(uint64_t height, std::list<cryptonote::block_complete_entry> bcel, const boost::uuids::uuid &connection_id, float rate, size_t size)
+void block_queue::add_blocks(uint64_t height, std::vector<cryptonote::block_complete_entry> bcel, const boost::uuids::uuid &connection_id, float rate, size_t size)
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
-  std::list<crypto::hash> hashes;
+  std::vector<crypto::hash> hashes;
   bool has_hashes = remove_span(height, &hashes);
   blocks.insert(span(height, std::move(bcel), connection_id, rate, size));
   if (has_hashes)
@@ -97,7 +97,7 @@ void block_queue::flush_stale_spans(const std::set<boost::uuids::uuid> &live_con
   }
 }
 
-bool block_queue::remove_span(uint64_t start_block_height, std::list<crypto::hash> *hashes)
+bool block_queue::remove_span(uint64_t start_block_height, std::vector<crypto::hash> *hashes)
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
   for (block_map::iterator i = blocks.begin(); i != blocks.end(); ++i)
@@ -172,7 +172,7 @@ bool block_queue::requested(const crypto::hash &hash) const
   return false;
 }
 
-std::pair<uint64_t, uint64_t> block_queue::reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, const std::list<crypto::hash> &block_hashes, boost::posix_time::ptime time)
+std::pair<uint64_t, uint64_t> block_queue::reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, const std::vector<crypto::hash> &block_hashes, boost::posix_time::ptime time)
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
 
@@ -183,14 +183,14 @@ std::pair<uint64_t, uint64_t> block_queue::reserve_span(uint64_t first_block_hei
   }
 
   uint64_t span_start_height = last_block_height - block_hashes.size() + 1;
-  std::list<crypto::hash>::const_iterator i = block_hashes.begin();
+  std::vector<crypto::hash>::const_iterator i = block_hashes.begin();
   while (i != block_hashes.end() && requested(*i))
   {
     ++i;
     ++span_start_height;
   }
   uint64_t span_length = 0;
-  std::list<crypto::hash> hashes;
+  std::vector<crypto::hash> hashes;
   while (i != block_hashes.end() && span_length < max_blocks)
   {
     hashes.push_back(*i);
@@ -230,7 +230,7 @@ std::pair<uint64_t, uint64_t> block_queue::get_start_gap_span() const
   return std::make_pair(current_height + 1, first_span_height - current_height - 1);
 }
 
-std::pair<uint64_t, uint64_t> block_queue::get_next_span_if_scheduled(std::list<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const
+std::pair<uint64_t, uint64_t> block_queue::get_next_span_if_scheduled(std::vector<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
   if (blocks.empty())
@@ -248,7 +248,7 @@ std::pair<uint64_t, uint64_t> block_queue::get_next_span_if_scheduled(std::list<
   return std::make_pair(i->start_block_height, i->nblocks);
 }
 
-void block_queue::set_span_hashes(uint64_t start_height, const boost::uuids::uuid &connection_id, std::list<crypto::hash> hashes)
+void block_queue::set_span_hashes(uint64_t start_height, const boost::uuids::uuid &connection_id, std::vector<crypto::hash> hashes)
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
   for (block_map::iterator i = blocks.begin(); i != blocks.end(); ++i)
@@ -264,7 +264,7 @@ void block_queue::set_span_hashes(uint64_t start_height, const boost::uuids::uui
   }
 }
 
-bool block_queue::get_next_span(uint64_t &height, std::list<cryptonote::block_complete_entry> &bcel, boost::uuids::uuid &connection_id, bool filled) const
+bool block_queue::get_next_span(uint64_t &height, std::vector<cryptonote::block_complete_entry> &bcel, boost::uuids::uuid &connection_id, bool filled) const
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
   if (blocks.empty())
diff --git a/src/cryptonote_protocol/block_queue.h b/src/cryptonote_protocol/block_queue.h
index 69ddaa435..9059e89ac 100644
--- a/src/cryptonote_protocol/block_queue.h
+++ b/src/cryptonote_protocol/block_queue.h
@@ -31,7 +31,7 @@
 #pragma once
 
 #include <string>
-#include <list>
+#include <vector>
 #include <set>
 #include <boost/thread/recursive_mutex.hpp>
 #include <boost/uuid/uuid.hpp>
@@ -49,15 +49,15 @@ namespace cryptonote
     struct span
     {
       uint64_t start_block_height;
-      std::list<crypto::hash> hashes;
-      std::list<cryptonote::block_complete_entry> blocks;
+      std::vector<crypto::hash> hashes;
+      std::vector<cryptonote::block_complete_entry> blocks;
       boost::uuids::uuid connection_id;
       uint64_t nblocks;
       float rate;
       size_t size;
       boost::posix_time::ptime time;
 
-      span(uint64_t start_block_height, std::list<cryptonote::block_complete_entry> blocks, const boost::uuids::uuid &connection_id, float rate, size_t size):
+      span(uint64_t start_block_height, std::vector<cryptonote::block_complete_entry> blocks, const boost::uuids::uuid &connection_id, float rate, size_t size):
         start_block_height(start_block_height), blocks(std::move(blocks)), connection_id(connection_id), nblocks(this->blocks.size()), rate(rate), size(size), time() {}
       span(uint64_t start_block_height, uint64_t nblocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time):
         start_block_height(start_block_height), connection_id(connection_id), nblocks(nblocks), rate(0.0f), size(0), time(time) {}
@@ -67,21 +67,21 @@ namespace cryptonote
     typedef std::set<span> block_map;
 
   public:
-    void add_blocks(uint64_t height, std::list<cryptonote::block_complete_entry> bcel, const boost::uuids::uuid &connection_id, float rate, size_t size);
+    void add_blocks(uint64_t height, std::vector<cryptonote::block_complete_entry> bcel, const boost::uuids::uuid &connection_id, float rate, size_t size);
     void add_blocks(uint64_t height, uint64_t nblocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time = boost::date_time::min_date_time);
     void flush_spans(const boost::uuids::uuid &connection_id, bool all = false);
     void flush_stale_spans(const std::set<boost::uuids::uuid> &live_connections);
-    bool remove_span(uint64_t start_block_height, std::list<crypto::hash> *hashes = NULL);
+    bool remove_span(uint64_t start_block_height, std::vector<crypto::hash> *hashes = NULL);
     void remove_spans(const boost::uuids::uuid &connection_id, uint64_t start_block_height);
     uint64_t get_max_block_height() const;
     void print() const;
     std::string get_overview() const;
-    std::pair<uint64_t, uint64_t> reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, const std::list<crypto::hash> &block_hashes, boost::posix_time::ptime time = boost::posix_time::microsec_clock::universal_time());
+    std::pair<uint64_t, uint64_t> reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, const std::vector<crypto::hash> &block_hashes, boost::posix_time::ptime time = boost::posix_time::microsec_clock::universal_time());
     bool is_blockchain_placeholder(const span &span) const;
     std::pair<uint64_t, uint64_t> get_start_gap_span() const;
-    std::pair<uint64_t, uint64_t> get_next_span_if_scheduled(std::list<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const;
-    void set_span_hashes(uint64_t start_height, const boost::uuids::uuid &connection_id, std::list<crypto::hash> hashes);
-    bool get_next_span(uint64_t &height, std::list<cryptonote::block_complete_entry> &bcel, boost::uuids::uuid &connection_id, bool filled = true) const;
+    std::pair<uint64_t, uint64_t> get_next_span_if_scheduled(std::vector<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const;
+    void set_span_hashes(uint64_t start_height, const boost::uuids::uuid &connection_id, std::vector<crypto::hash> hashes);
+    bool get_next_span(uint64_t &height, std::vector<cryptonote::block_complete_entry> &bcel, boost::uuids::uuid &connection_id, bool filled = true) const;
     bool has_next_span(const boost::uuids::uuid &connection_id, bool &filled) const;
     size_t get_data_size() const;
     size_t get_num_filled_spans_prefix() const;
diff --git a/src/cryptonote_protocol/cryptonote_protocol_defs.h b/src/cryptonote_protocol/cryptonote_protocol_defs.h
index cf0043287..db159f0f4 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_defs.h
+++ b/src/cryptonote_protocol/cryptonote_protocol_defs.h
@@ -109,7 +109,7 @@ namespace cryptonote
   struct block_complete_entry
   {
     blobdata block;
-    std::list<blobdata> txs;
+    std::vector<blobdata> txs;
     BEGIN_KV_SERIALIZE_MAP()
       KV_SERIALIZE(block)
       KV_SERIALIZE(txs)
@@ -145,7 +145,7 @@ namespace cryptonote
 
     struct request
     {
-      std::list<blobdata>   txs;
+      std::vector<blobdata>   txs;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(txs)
@@ -161,8 +161,8 @@ namespace cryptonote
 
     struct request
     {
-      std::list<crypto::hash>    txs;
-      std::list<crypto::hash>    blocks;
+      std::vector<crypto::hash>    txs;
+      std::vector<crypto::hash>    blocks;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_CONTAINER_POD_AS_BLOB(txs)
@@ -177,9 +177,9 @@ namespace cryptonote
 
     struct request
     {
-      std::list<blobdata>              txs;
-      std::list<block_complete_entry>  blocks;
-      std::list<crypto::hash>               missed_ids;
+      std::vector<blobdata>              txs;
+      std::vector<block_complete_entry>  blocks;
+      std::vector<crypto::hash>          missed_ids;
       uint64_t                         current_blockchain_height;
 
       BEGIN_KV_SERIALIZE_MAP()
@@ -230,7 +230,7 @@ namespace cryptonote
       uint64_t start_height;
       uint64_t total_height;
       uint64_t cumulative_difficulty;
-      std::list<crypto::hash> m_block_ids;
+      std::vector<crypto::hash> m_block_ids;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(start_height)
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index dd34e461e..56aa1dc06 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -351,7 +351,7 @@ namespace cryptonote
       return 1;
     }
     m_core.pause_mine();
-    std::list<block_complete_entry> blocks;
+    std::vector<block_complete_entry> blocks;
     blocks.push_back(arg.b);
     m_core.prepare_handle_incoming_blocks(blocks);
     for(auto tx_blob_it = arg.b.txs.begin(); tx_blob_it!=arg.b.txs.end();tx_blob_it++)
@@ -438,7 +438,7 @@ namespace cryptonote
         }
       }      
       
-      std::list<blobdata> have_tx;
+      std::vector<blobdata> have_tx;
       
       // Instead of requesting missing transactions by hash like BTC, 
       // we do it by index (thanks to a suggestion from moneromooo) because
@@ -578,8 +578,8 @@ namespace cryptonote
         else
         {
           std::vector<crypto::hash> tx_ids;
-          std::list<transaction> txes;
-          std::list<crypto::hash> missing;
+          std::vector<transaction> txes;
+          std::vector<crypto::hash> missing;
           tx_ids.push_back(tx_hash);
           if (m_core.get_transactions(tx_ids, txes, missing) && missing.empty())
           {
@@ -626,7 +626,7 @@ namespace cryptonote
         b.block = arg.b.block;
         b.txs = have_tx;
 
-        std::list<block_complete_entry> blocks;
+        std::vector<block_complete_entry> blocks;
         blocks.push_back(b);
         m_core.prepare_handle_incoming_blocks(blocks);
           
@@ -687,8 +687,8 @@ namespace cryptonote
   {
     MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_FLUFFY_MISSING_TX (" << arg.missing_tx_indices.size() << " txes), block hash " << arg.block_hash);
     
-    std::list<std::pair<cryptonote::blobdata, block>> local_blocks;
-    std::list<cryptonote::blobdata> local_txs;
+    std::vector<std::pair<cryptonote::blobdata, block>> local_blocks;
+    std::vector<cryptonote::blobdata> local_txs;
 
     block b;
     if (!m_core.get_block_by_hash(arg.block_hash, b))
@@ -725,8 +725,8 @@ namespace cryptonote
       }
     }    
 
-    std::list<cryptonote::transaction> txs;
-    std::list<crypto::hash> missed;
+    std::vector<cryptonote::transaction> txs;
+    std::vector<crypto::hash> missed;
     if (!m_core.get_transactions(txids, txs, missed))
     {
       LOG_ERROR_CCONTEXT("Failed to handle request NOTIFY_REQUEST_FLUFFY_MISSING_TX, "
@@ -774,10 +774,12 @@ namespace cryptonote
       return 1;
     }
 
-    for(auto tx_blob_it = arg.txs.begin(); tx_blob_it!=arg.txs.end();)
+    std::vector<cryptonote::blobdata> newtxs;
+    newtxs.reserve(arg.txs.size());
+    for (size_t i = 0; i < arg.txs.size(); ++i)
     {
       cryptonote::tx_verification_context tvc = AUTO_VAL_INIT(tvc);
-      m_core.handle_incoming_tx(*tx_blob_it, tvc, false, true, false);
+      m_core.handle_incoming_tx(arg.txs[i], tvc, false, true, false);
       if(tvc.m_verifivation_failed)
       {
         LOG_PRINT_CCONTEXT_L1("Tx verification failed, dropping connection");
@@ -785,10 +787,9 @@ namespace cryptonote
         return 1;
       }
       if(tvc.m_should_be_relayed)
-        ++tx_blob_it;
-      else
-        arg.txs.erase(tx_blob_it++);
+        newtxs.push_back(std::move(arg.txs[i]));
     }
+    arg.txs = std::move(newtxs);
 
     if(arg.txs.size())
     {
@@ -996,7 +997,7 @@ skip:
         {
           const uint64_t previous_height = m_core.get_current_blockchain_height();
           uint64_t start_height;
-          std::list<cryptonote::block_complete_entry> blocks;
+          std::vector<cryptonote::block_complete_entry> blocks;
           boost::uuids::uuid span_connection_id;
           if (!m_block_queue.get_next_span(start_height, blocks, span_connection_id))
           {
@@ -1070,7 +1071,7 @@ skip:
               LOG_ERROR_CCONTEXT("Internal error: tvc.size() != block_entry.txs.size()");
               return 1;
             }
-            std::list<blobdata>::const_iterator it = block_entry.txs.begin();
+            std::vector<blobdata>::const_iterator it = block_entry.txs.begin();
             for (size_t i = 0; i < tvc.size(); ++i, ++it)
             {
               if(tvc[i].m_verifivation_failed)
@@ -1248,7 +1249,7 @@ skip:
   template<class t_core>
   bool t_cryptonote_protocol_handler<t_core>::should_download_next_span(cryptonote_connection_context& context) const
   {
-    std::list<crypto::hash> hashes;
+    std::vector<crypto::hash> hashes;
     boost::uuids::uuid span_connection_id;
     boost::posix_time::ptime request_time;
     std::pair<uint64_t, uint64_t> span;
@@ -1267,7 +1268,7 @@ skip:
       // we might be in a weird case where there is a filled next span,
       // but it starts higher than the current height
       uint64_t height;
-      std::list<cryptonote::block_complete_entry> bcel;
+      std::vector<cryptonote::block_complete_entry> bcel;
       if (!m_block_queue.get_next_span(height, bcel, span_connection_id, true))
         return false;
       if (height > m_core.get_current_blockchain_height())
@@ -1415,7 +1416,7 @@ skip:
       {
         if (span.second == 0)
         {
-          std::list<crypto::hash> hashes;
+          std::vector<crypto::hash> hashes;
           boost::uuids::uuid span_connection_id;
           boost::posix_time::ptime time;
           span = m_block_queue.get_next_span_if_scheduled(hashes, span_connection_id, time);
@@ -1441,14 +1442,18 @@ skip:
           goto skip;
         }
         // take out blocks we already have
-        while (!context.m_needed_objects.empty() && m_core.have_block(context.m_needed_objects.front()))
+        size_t skip = 0;
+        while (skip < context.m_needed_objects.size() && m_core.have_block(context.m_needed_objects[skip]))
         {
           // if we're popping the last hash, record it so we can ask again from that hash,
           // this prevents never being able to progress on peers we get old hash lists from
-          if (context.m_needed_objects.size() == 1)
-            context.m_last_known_hash = context.m_needed_objects.front();
-          context.m_needed_objects.pop_front();
+          if (skip + 1 == context.m_needed_objects.size())
+            context.m_last_known_hash = context.m_needed_objects[skip];
+          ++skip;
         }
+        if (skip > 0)
+          context.m_needed_objects = std::vector<crypto::hash>(context.m_needed_objects.begin() + skip, context.m_needed_objects.end());
+
         const uint64_t first_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
         span = m_block_queue.reserve_span(first_block_height, context.m_last_response_height, count_limit, context.m_connection_id, context.m_needed_objects);
         MDEBUG(context << " span from " << first_block_height << ": " << span.first << "/" << span.second);
@@ -1456,7 +1461,7 @@ skip:
       if (span.second == 0 && !force_next_span)
       {
         MDEBUG(context << " still no span reserved, we may be in the corner case of next span scheduled and everything else scheduled/filled");
-        std::list<crypto::hash> hashes;
+        std::vector<crypto::hash> hashes;
         boost::uuids::uuid span_connection_id;
         boost::posix_time::ptime time;
         span = m_block_queue.get_next_span_if_scheduled(hashes, span_connection_id, time);
@@ -1487,23 +1492,21 @@ skip:
             MERROR("ERROR: skip " << skip << ", m_needed_objects " << context.m_needed_objects.size() << ", first_context_block_height" << first_context_block_height);
             return false;
           }
-          while (skip--)
-            context.m_needed_objects.pop_front();
+          if (skip > 0)
+            context.m_needed_objects = std::vector<crypto::hash>(context.m_needed_objects.begin() + skip, context.m_needed_objects.end());
           if (context.m_needed_objects.size() < span.second)
           {
             MERROR("ERROR: span " << span.first << "/" << span.second << ", m_needed_objects " << context.m_needed_objects.size());
             return false;
           }
 
-          auto it = context.m_needed_objects.begin();
           for (size_t n = 0; n < span.second; ++n)
           {
-            req.blocks.push_back(*it);
+            req.blocks.push_back(context.m_needed_objects[n]);
             ++count;
-            context.m_requested_objects.insert(*it);
-            auto j = it++;
-            context.m_needed_objects.erase(j);
+            context.m_requested_objects.insert(context.m_needed_objects[n]);
           }
+          context.m_needed_objects = std::vector<crypto::hash>(context.m_needed_objects.begin() + span.second, context.m_needed_objects.end());
         }
 
         context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
@@ -1664,7 +1667,7 @@ skip:
   {
     NOTIFY_NEW_FLUFFY_BLOCK::request fluffy_arg = AUTO_VAL_INIT(fluffy_arg);
     fluffy_arg.current_blockchain_height = arg.current_blockchain_height;    
-    std::list<blobdata> fluffy_txs;
+    std::vector<blobdata> fluffy_txs;
     fluffy_arg.b = arg.b;
     fluffy_arg.b.txs = fluffy_txs;
 
diff --git a/src/ringct/rctSigs.cpp b/src/ringct/rctSigs.cpp
index 777b4d13a..cc6fbe738 100644
--- a/src/ringct/rctSigs.cpp
+++ b/src/ringct/rctSigs.cpp
@@ -862,9 +862,9 @@ namespace rct {
                   results[i] = verBulletproof(rv.p.bulletproofs[i]);
                 else
                   results[i] = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
-              });
+              }, true);
             }
-            waiter.wait();
+            waiter.wait(&tpool);
 
             for (size_t i = 0; i < rv.outPk.size(); ++i) {
               if (!results[i]) {
@@ -970,9 +970,9 @@ namespace rct {
                 results[i] = verBulletproof(rv.p.bulletproofs[i]);
               else
                 results[i] = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
-            });
+            }, true);
           }
-          waiter.wait();
+          waiter.wait(&tpool);
 
           for (size_t i = 0; i < results.size(); ++i) {
             if (!results[i]) {
@@ -989,9 +989,9 @@ namespace rct {
           for (size_t i = 0 ; i < rv.mixRing.size() ; i++) {
             tpool.submit(&waiter, [&, i] {
                 results[i] = verRctMGSimple(message, rv.p.MGs[i], rv.mixRing[i], pseudoOuts[i]);
-            });
+            }, true);
           }
-          waiter.wait();
+          waiter.wait(&tpool);
 
           for (size_t i = 0; i < results.size(); ++i) {
             if (!results[i]) {
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index dc7b6b30f..b55b1994b 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -226,47 +226,47 @@ namespace cryptonote
     if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCKS_FAST>(invoke_http_mode::BIN, "/getblocks.bin", req, res, r))
       return r;
 
-    std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > > bs;
+    std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > > bs;
 
-    if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, bs, res.current_height, res.start_height, req.prune, COMMAND_RPC_GET_BLOCKS_FAST_MAX_COUNT))
+    if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, bs, res.current_height, res.start_height, req.prune, !req.no_miner_tx, COMMAND_RPC_GET_BLOCKS_FAST_MAX_COUNT))
     {
       res.status = "Failed";
       return false;
     }
 
     size_t pruned_size = 0, unpruned_size = 0, ntxes = 0;
+    res.blocks.reserve(bs.size());
+    res.output_indices.reserve(bs.size());
     for(auto& bd: bs)
     {
       res.blocks.resize(res.blocks.size()+1);
-      res.blocks.back().block = bd.first;
-      pruned_size += bd.first.size();
-      unpruned_size += bd.first.size();
+      res.blocks.back().block = bd.first.first;
+      pruned_size += bd.first.first.size();
+      unpruned_size += bd.first.first.size();
       res.output_indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices());
       res.output_indices.back().indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::tx_output_indices());
-      block b;
-      if (!parse_and_validate_block_from_blob(bd.first, b))
+      if (!req.no_miner_tx)
       {
-        res.status = "Invalid block";
-        return false;
-      }
-      bool r = m_core.get_tx_outputs_gindexs(get_transaction_hash(b.miner_tx), res.output_indices.back().indices.back().indices);
-      if (!r)
-      {
-        res.status = "Failed";
-        return false;
+        bool r = m_core.get_tx_outputs_gindexs(bd.first.second, res.output_indices.back().indices.back().indices);
+        if (!r)
+        {
+          res.status = "Failed";
+          return false;
+        }
       }
-      size_t txidx = 0;
       ntxes += bd.second.size();
-      for (std::list<cryptonote::blobdata>::iterator i = bd.second.begin(); i != bd.second.end(); ++i)
+      res.blocks.back().txs.reserve(bd.second.size());
+      res.output_indices.back().indices.reserve(bd.second.size());
+      for (std::vector<std::pair<crypto::hash, cryptonote::blobdata>>::iterator i = bd.second.begin(); i != bd.second.end(); ++i)
       {
-        unpruned_size += i->size();
-        res.blocks.back().txs.push_back(std::move(*i));
-        i->clear();
-        i->shrink_to_fit();
+        unpruned_size += i->second.size();
+        res.blocks.back().txs.push_back(std::move(i->second));
+        i->second.clear();
+        i->second.shrink_to_fit();
         pruned_size += res.blocks.back().txs.back().size();
 
         res.output_indices.back().indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::tx_output_indices());
-        bool r = m_core.get_tx_outputs_gindexs(b.tx_hashes[txidx++], res.output_indices.back().indices.back().indices);
+        bool r = m_core.get_tx_outputs_gindexs(i->first, res.output_indices.back().indices.back().indices);
         if (!r)
         {
           res.status = "Failed";
@@ -286,7 +286,7 @@ namespace cryptonote
       if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_ALT_BLOCKS_HASHES>(invoke_http_mode::JON, "/get_alt_blocks_hashes", req, res, r))
         return r;
 
-      std::list<block> blks;
+      std::vector<block> blks;
 
       if(!m_core.get_alternative_blocks(blks))
       {
@@ -328,8 +328,8 @@ namespace cryptonote
         res.status = "Error retrieving block at height " + std::to_string(height);
         return true;
       }
-      std::list<transaction> txs;
-      std::list<crypto::hash> missed_txs;
+      std::vector<transaction> txs;
+      std::vector<crypto::hash> missed_txs;
       m_core.get_transactions(blk.tx_hashes, txs, missed_txs);
       res.blocks.resize(res.blocks.size() + 1);
       res.blocks.back().block = block_to_blob(blk);
@@ -544,8 +544,8 @@ namespace cryptonote
       }
       vh.push_back(*reinterpret_cast<const crypto::hash*>(b.data()));
     }
-    std::list<crypto::hash> missed_txs;
-    std::list<transaction> txs;
+    std::vector<crypto::hash> missed_txs;
+    std::vector<transaction> txs;
     bool r = m_core.get_transactions(vh, txs, missed_txs);
     if(!r)
     {
@@ -566,25 +566,26 @@ namespace cryptonote
       if(r)
       {
         // sort to match original request
-        std::list<transaction> sorted_txs;
+        std::vector<transaction> sorted_txs;
         std::vector<tx_info>::const_iterator i;
+        unsigned txs_processed = 0;
         for (const crypto::hash &h: vh)
         {
           if (std::find(missed_txs.begin(), missed_txs.end(), h) == missed_txs.end())
           {
-            if (txs.empty())
+            if (txs.size() == txs_processed)
             {
               res.status = "Failed: internal error - txs is empty";
               return true;
             }
             // core returns the ones it finds in the right order
-            if (get_transaction_hash(txs.front()) != h)
+            if (get_transaction_hash(txs[txs_processed]) != h)
             {
               res.status = "Failed: tx hash mismatch";
               return true;
             }
-            sorted_txs.push_back(std::move(txs.front()));
-            txs.pop_front();
+            sorted_txs.push_back(std::move(txs[txs_processed]));
+            ++txs_processed;
           }
           else if ((i = std::find_if(pool_tx_info.begin(), pool_tx_info.end(), [h](const tx_info &txi) { return epee::string_tools::pod_to_hex(h) == txi.id_hash; })) != pool_tx_info.end())
           {
@@ -595,7 +596,7 @@ namespace cryptonote
               return true;
             }
             sorted_txs.push_back(tx);
-            missed_txs.remove(h);
+            missed_txs.erase(std::find(missed_txs.begin(), missed_txs.end(), h));
             pool_tx_hashes.insert(h);
             const std::string hash_string = epee::string_tools::pod_to_hex(h);
             for (const auto &ti: pool_tx_info)
@@ -614,7 +615,7 @@ namespace cryptonote
       LOG_PRINT_L2("Found " << found_in_pool << "/" << vh.size() << " transactions in the pool");
     }
 
-    std::list<std::string>::const_iterator txhi = req.txs_hashes.begin();
+    std::vector<std::string>::const_iterator txhi = req.txs_hashes.begin();
     std::vector<crypto::hash>::const_iterator vhi = vh.begin();
     for(auto& tx: txs)
     {
@@ -1655,10 +1656,10 @@ namespace cryptonote
     PERF_TIMER(on_flush_txpool);
 
     bool failed = false;
-    std::list<crypto::hash> txids;
+    std::vector<crypto::hash> txids;
     if (req.txids.empty())
     {
-      std::list<transaction> pool_txs;
+      std::vector<transaction> pool_txs;
       bool r = m_core.get_pool_transactions(pool_txs);
       if (!r)
       {
diff --git a/src/rpc/core_rpc_server_commands_defs.h b/src/rpc/core_rpc_server_commands_defs.h
index 1e624da1b..49b730149 100644
--- a/src/rpc/core_rpc_server_commands_defs.h
+++ b/src/rpc/core_rpc_server_commands_defs.h
@@ -83,10 +83,12 @@ namespace cryptonote
       std::list<crypto::hash> block_ids; //*first 10 blocks id goes sequential, next goes in pow(2,n) offset, like 2, 4, 8, 16, 32, 64 and so on, and the last one is always genesis block */
       uint64_t    start_height;
       bool        prune;
+      bool        no_miner_tx;
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_CONTAINER_POD_AS_BLOB(block_ids)
         KV_SERIALIZE(start_height)
         KV_SERIALIZE(prune)
+        KV_SERIALIZE_OPT(no_miner_tx, false)
       END_KV_SERIALIZE_MAP()
     };
 
@@ -110,7 +112,7 @@ namespace cryptonote
 
     struct response
     {
-      std::list<block_complete_entry> blocks;
+      std::vector<block_complete_entry> blocks;
       uint64_t    start_height;
       uint64_t    current_height;
       std::string status;
@@ -188,7 +190,7 @@ namespace cryptonote
 
     struct response
     {
-      std::list<crypto::hash> m_block_ids;
+      std::vector<crypto::hash> m_block_ids;
       uint64_t    start_height;
       uint64_t    current_height;
       std::string status;
@@ -273,7 +275,7 @@ namespace cryptonote
         uint64_t total_received;
         uint64_t total_received_unlocked = 0; // OpenMonero only
         uint64_t scanned_height;
-        std::list<transaction> transactions;
+        std::vector<transaction> transactions;
         uint64_t blockchain_height;
         uint64_t scanned_block_height;
         std::string status;
@@ -561,7 +563,7 @@ namespace cryptonote
   {
     struct request
     {
-      std::list<std::string> txs_hashes;
+      std::vector<std::string> txs_hashes;
       bool decode_as_json;
       bool prune;
 
@@ -598,11 +600,11 @@ namespace cryptonote
     struct response
     {
       // older compatibility stuff
-      std::list<std::string> txs_as_hex;  //transactions blobs as hex (old compat)
-      std::list<std::string> txs_as_json; //transactions decoded as json (old compat)
+      std::vector<std::string> txs_as_hex;  //transactions blobs as hex (old compat)
+      std::vector<std::string> txs_as_json; //transactions decoded as json (old compat)
 
       // in both old and new
-      std::list<std::string> missed_tx;   //not found transactions
+      std::vector<std::string> missed_tx;   //not found transactions
 
       // new style
       std::vector<entry> txs;
@@ -1931,7 +1933,7 @@ namespace cryptonote
   {
     struct request
     {
-      std::list<std::string> txids;
+      std::vector<std::string> txids;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(txids)
@@ -2148,7 +2150,7 @@ namespace cryptonote
   {
     struct request
     {
-      std::list<std::string> txids;
+      std::vector<std::string> txids;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(txids)
diff --git a/src/rpc/daemon_handler.cpp b/src/rpc/daemon_handler.cpp
index 39f169cdf..55858cc2a 100644
--- a/src/rpc/daemon_handler.cpp
+++ b/src/rpc/daemon_handler.cpp
@@ -50,9 +50,9 @@ namespace rpc
 
   void DaemonHandler::handle(const GetBlocksFast::Request& req, GetBlocksFast::Response& res)
   {
-    std::list<std::pair<blobdata, std::list<blobdata> > > blocks;
+    std::vector<std::pair<std::pair<blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, blobdata> > > > blocks;
 
-    if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, blocks, res.current_height, res.start_height, req.prune, COMMAND_RPC_GET_BLOCKS_FAST_MAX_COUNT))
+    if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, blocks, res.current_height, res.start_height, req.prune, true, COMMAND_RPC_GET_BLOCKS_FAST_MAX_COUNT))
     {
       res.status = Message::STATUS_FAILED;
       res.error_details = "core::find_blockchain_supplement() returned false";
@@ -62,9 +62,6 @@ namespace rpc
     res.blocks.resize(blocks.size());
     res.output_indices.resize(blocks.size());
 
-    //TODO: really need to switch uses of std::list to std::vector unless
-    //      it's a huge performance concern
-
     auto it = blocks.begin();
 
     uint64_t block_count = 0;
@@ -72,7 +69,7 @@ namespace rpc
     {
       cryptonote::rpc::block_with_transactions& bwt = res.blocks[block_count];
 
-      if (!parse_and_validate_block_from_blob(it->first, bwt.block))
+      if (!parse_and_validate_block_from_blob(it->first.first, bwt.block))
       {
         res.blocks.clear();
         res.output_indices.clear();
@@ -89,11 +86,11 @@ namespace rpc
           res.error_details = "incorrect number of transactions retrieved for block";
           return;
       }
-      std::list<transaction> txs;
-      for (const auto& blob : it->second)
+      std::vector<transaction> txs;
+      for (const auto& p : it->second)
       {
         txs.resize(txs.size() + 1);
-        if (!parse_and_validate_tx_from_blob(blob, txs.back()))
+        if (!parse_and_validate_tx_from_blob(p.second, txs.back()))
         {
           res.blocks.clear();
           res.output_indices.clear();
@@ -163,10 +160,10 @@ namespace rpc
 
   void DaemonHandler::handle(const GetTransactions::Request& req, GetTransactions::Response& res)
   {
-    std::list<cryptonote::transaction> found_txs;
-    std::list<crypto::hash> missed_hashes;
+    std::vector<cryptonote::transaction> found_txs_vec;
+    std::vector<crypto::hash> missed_vec;
 
-    bool r = m_core.get_transactions(req.tx_hashes, found_txs, missed_hashes);
+    bool r = m_core.get_transactions(req.tx_hashes, found_txs_vec, missed_vec);
 
     // TODO: consider fixing core::get_transactions to not hide exceptions
     if (!r)
@@ -176,20 +173,7 @@ namespace rpc
       return;
     }
 
-    size_t num_found = found_txs.size();
-
-    // std::list is annoying
-    std::vector<cryptonote::transaction> found_txs_vec
-    {
-      std::make_move_iterator(std::begin(found_txs)),
-      std::make_move_iterator(std::end(found_txs))
-    };
-
-    std::vector<crypto::hash> missed_vec
-    {
-      std::make_move_iterator(std::begin(missed_hashes)),
-      std::make_move_iterator(std::end(missed_hashes))
-    };
+    size_t num_found = found_txs_vec.size();
 
     std::vector<uint64_t> heights(num_found);
     std::vector<bool> in_pool(num_found, false);
@@ -204,7 +188,7 @@ namespace rpc
     // if any missing from blockchain, check in tx pool
     if (!missed_vec.empty())
     {
-      std::list<cryptonote::transaction> pool_txs;
+      std::vector<cryptonote::transaction> pool_txs;
 
       m_core.get_pool_transactions(pool_txs);
 
diff --git a/src/rpc/daemon_messages.h b/src/rpc/daemon_messages.h
index 1495c845f..8fff369df 100644
--- a/src/rpc/daemon_messages.h
+++ b/src/rpc/daemon_messages.h
@@ -106,7 +106,7 @@ BEGIN_RPC_MESSAGE_CLASS(GetHashesFast);
     RPC_MESSAGE_MEMBER(uint64_t, start_height);
   END_RPC_MESSAGE_REQUEST;
   BEGIN_RPC_MESSAGE_RESPONSE;
-    RPC_MESSAGE_MEMBER(std::list<crypto::hash>, hashes);
+    RPC_MESSAGE_MEMBER(std::vector<crypto::hash>, hashes);
     RPC_MESSAGE_MEMBER(uint64_t, start_height);
     RPC_MESSAGE_MEMBER(uint64_t, current_height);
   END_RPC_MESSAGE_RESPONSE;
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 9bd58e561..aa6874d17 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -119,6 +119,7 @@ using namespace cryptonote;
 
 static const std::string MULTISIG_SIGNATURE_MAGIC = "SigMultisigPkV1";
 
+std::atomic<unsigned int> tools::wallet2::key_ref::refs(0);
 
 namespace
 {
@@ -769,8 +770,6 @@ bool wallet2::init(std::string daemon_address, boost::optional<epee::net_utils::
   m_daemon_address = std::move(daemon_address);
   m_daemon_login = std::move(daemon_login);
   // When switching from light wallet to full wallet, we need to reset the height we got from lw node.
-  if(m_light_wallet)
-    m_local_bc_height = m_blockchain.size();
   return m_http_client.set_server(get_daemon_address(), get_daemon_login(), ssl);
 }
 //----------------------------------------------------------------------------------------------------
@@ -1035,6 +1034,23 @@ void wallet2::check_acc_out_precomp(const tx_out &o, const crypto::key_derivatio
   tx_scan_info.error = false;
 }
 //----------------------------------------------------------------------------------------------------
+void wallet2::check_acc_out_precomp(const tx_out &o, const crypto::key_derivation &derivation, const std::vector<crypto::key_derivation> &additional_derivations, size_t i, const is_out_data *is_out_data, tx_scan_info_t &tx_scan_info) const
+{
+  if (!is_out_data || i >= is_out_data->received.size())
+    return check_acc_out_precomp(o, derivation, additional_derivations, i, tx_scan_info);
+
+  tx_scan_info.received = is_out_data->received[i];
+  if(tx_scan_info.received)
+  {
+    tx_scan_info.money_transfered = o.amount; // may be 0 for ringct outputs
+  }
+  else
+  {
+    tx_scan_info.money_transfered = 0;
+  }
+  tx_scan_info.error = false;
+}
+//----------------------------------------------------------------------------------------------------
 static uint64_t decodeRct(const rct::rctSig & rv, const crypto::key_derivation &derivation, unsigned int i, rct::key & mask, hw::device &hwdev)
 {
   crypto::secret_key scalar1;
@@ -1088,16 +1104,48 @@ void wallet2::scan_output(const cryptonote::transaction &tx, const crypto::publi
   ++num_vouts_received;
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen)
+void wallet2::cache_tx_data(const cryptonote::transaction& tx, const crypto::hash &txid, tx_cache_data &tx_cache_data) const
 {
-  //ensure device is let in NONE mode in any case
-  hw::device &hwdev = m_account.get_device(); 
-  
-  boost::unique_lock<hw::device> hwdev_lock (hwdev);
-  hw::reset_mode rst(hwdev);  
-  hwdev_lock.unlock();
+  const cryptonote::account_keys& keys = m_account.get_keys();
 
- // In this function, tx (probably) only contains the base information
+  if(!parse_tx_extra(tx.extra, tx_cache_data.tx_extra_fields))
+  {
+    // Extra may only be partially parsed, it's OK if tx_extra_fields contains public key
+    LOG_PRINT_L0("Transaction extra has unsupported format: " << txid);
+    tx_cache_data.tx_extra_fields.clear();
+    return;
+  }
+
+  // Don't try to extract tx public key if tx has no ouputs
+  const bool is_miner = tx.vin.size() == 1 && tx.vin[0].type() == typeid(cryptonote::txin_gen);
+  if (!is_miner || m_refresh_type != RefreshType::RefreshNoCoinbase)
+  {
+    const size_t rec_size = is_miner && m_refresh_type == RefreshType::RefreshOptimizeCoinbase ? 1 : tx.vout.size();
+    if (!tx.vout.empty())
+    {
+      // if tx.vout is not empty, we loop through all tx pubkeys
+      const std::vector<boost::optional<cryptonote::subaddress_receive_info>> rec(rec_size, boost::none);
+
+      tx_extra_pub_key pub_key_field;
+      size_t pk_index = 0;
+      while (find_tx_extra_field_by_type(tx_cache_data.tx_extra_fields, pub_key_field, pk_index++))
+        tx_cache_data.primary.push_back({pub_key_field.pub_key, {}, rec});
+
+      // additional tx pubkeys and derivations for multi-destination transfers involving one or more subaddresses
+      tx_extra_additional_pub_keys additional_tx_pub_keys;
+      std::vector<crypto::key_derivation> additional_derivations;
+      if (find_tx_extra_field_by_type(tx_cache_data.tx_extra_fields, additional_tx_pub_keys))
+      {
+        for (size_t i = 0; i < additional_tx_pub_keys.data.size(); ++i)
+          tx_cache_data.additional.push_back({additional_tx_pub_keys.data[i], {}, {}});
+      }
+    }
+  }
+}
+//----------------------------------------------------------------------------------------------------
+void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen, const tx_cache_data &tx_cache_data)
+{
+  // In this function, tx (probably) only contains the base information
   // (that is, the prunable stuff may or may not be included)
   if (!miner_tx && !pool)
     process_unconfirmed(txid, tx, height);
@@ -1105,12 +1153,16 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
   std::unordered_map<cryptonote::subaddress_index, uint64_t> tx_money_got_in_outs;  // per receiving subaddress index
   crypto::public_key tx_pub_key = null_pkey;
 
-  std::vector<tx_extra_field> tx_extra_fields;
-  if(!parse_tx_extra(tx.extra, tx_extra_fields))
+  std::vector<tx_extra_field> local_tx_extra_fields;
+  if (tx_cache_data.tx_extra_fields.empty())
   {
-    // Extra may only be partially parsed, it's OK if tx_extra_fields contains public key
-    LOG_PRINT_L0("Transaction extra has unsupported format: " << txid);
+    if(!parse_tx_extra(tx.extra, local_tx_extra_fields))
+    {
+      // Extra may only be partially parsed, it's OK if tx_extra_fields contains public key
+      LOG_PRINT_L0("Transaction extra has unsupported format: " << txid);
+    }
   }
+  const std::vector<tx_extra_field> &tx_extra_fields = tx_cache_data.tx_extra_fields.empty() ? local_tx_extra_fields : tx_cache_data.tx_extra_fields;
 
   // Don't try to extract tx public key if tx has no ouputs
   size_t pk_index = 0;
@@ -1129,6 +1181,11 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
 	m_callback->on_skip_transaction(height, txid, tx);
       break;
     }
+    if (!tx_cache_data.primary.empty())
+    {
+      THROW_WALLET_EXCEPTION_IF(tx_cache_data.primary.size() < pk_index || pub_key_field.pub_key != tx_cache_data.primary[pk_index - 1].pkey,
+          error::wallet_internal_error, "tx_cache_data is out of sync");
+    }
 
     int num_vouts_received = 0;
     tx_pub_key = pub_key_field.pub_key;
@@ -1137,28 +1194,49 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
     const cryptonote::account_keys& keys = m_account.get_keys();
     crypto::key_derivation derivation;
 
-    hwdev_lock.lock();
-    hwdev.set_mode(hw::device::TRANSACTION_PARSE);
-    if (!hwdev.generate_key_derivation(tx_pub_key, keys.m_view_secret_key, derivation))
+    std::vector<crypto::key_derivation> additional_derivations;
+    tx_extra_additional_pub_keys additional_tx_pub_keys;
+    const wallet2::is_out_data *is_out_data_ptr = NULL;
+    if (tx_cache_data.primary.empty())
     {
-      MWARNING("Failed to generate key derivation from tx pubkey, skipping");
-      static_assert(sizeof(derivation) == sizeof(rct::key), "Mismatched sizes of key_derivation and rct::key");
-      memcpy(&derivation, rct::identity().bytes, sizeof(derivation));
-    }
+      hw::device &hwdev = m_account.get_device();
+      boost::unique_lock<hw::device> hwdev_lock (hwdev);
+      hw::reset_mode rst(hwdev);
 
-    // additional tx pubkeys and derivations for multi-destination transfers involving one or more subaddresses
-    std::vector<crypto::public_key> additional_tx_pub_keys = get_additional_tx_pub_keys_from_extra(tx);
-    std::vector<crypto::key_derivation> additional_derivations;
-    for (size_t i = 0; i < additional_tx_pub_keys.size(); ++i)
+      hwdev.set_mode(hw::device::TRANSACTION_PARSE);
+      if (!hwdev.generate_key_derivation(tx_pub_key, keys.m_view_secret_key, derivation))
+      {
+        MWARNING("Failed to generate key derivation from tx pubkey in " << txid << ", skipping");
+        static_assert(sizeof(derivation) == sizeof(rct::key), "Mismatched sizes of key_derivation and rct::key");
+        memcpy(&derivation, rct::identity().bytes, sizeof(derivation));
+      }
+
+      // additional tx pubkeys and derivations for multi-destination transfers involving one or more subaddresses
+      if (find_tx_extra_field_by_type(tx_extra_fields, additional_tx_pub_keys))
+      {
+        for (size_t i = 0; i < additional_tx_pub_keys.data.size(); ++i)
+        {
+          additional_derivations.push_back({});
+          if (!hwdev.generate_key_derivation(additional_tx_pub_keys.data[i], keys.m_view_secret_key, additional_derivations.back()))
+          {
+            MWARNING("Failed to generate key derivation from additional tx pubkey in " << txid << ", skipping");
+            memcpy(&additional_derivations.back(), rct::identity().bytes, sizeof(crypto::key_derivation));
+          }
+        }
+      }
+    }
+    else
     {
-      additional_derivations.push_back({});
-      if (!hwdev.generate_key_derivation(additional_tx_pub_keys[i], keys.m_view_secret_key, additional_derivations.back()))
+      THROW_WALLET_EXCEPTION_IF(pk_index - 1 >= tx_cache_data.primary.size(),
+          error::wallet_internal_error, "pk_index out of range of tx_cache_data");
+      is_out_data_ptr = &tx_cache_data.primary[pk_index - 1];
+      derivation = tx_cache_data.primary[pk_index - 1].derivation;
+      for (size_t n = 0; n < tx_cache_data.additional.size(); ++n)
       {
-        MWARNING("Failed to generate key derivation from tx pubkey, skipping");
-        additional_derivations.pop_back();
+        additional_tx_pub_keys.data.push_back(tx_cache_data.additional[n].pkey);
+        additional_derivations.push_back(tx_cache_data.additional[n].derivation);
       }
     }
-    hwdev_lock.unlock();
 
     if (miner_tx && m_refresh_type == RefreshNoCoinbase)
     {
@@ -1166,7 +1244,7 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
     }
     else if (miner_tx && m_refresh_type == RefreshOptimizeCoinbase)
     {
-      check_acc_out_precomp(tx.vout[0], derivation, additional_derivations, 0, tx_scan_info[0]);
+      check_acc_out_precomp(tx.vout[0], derivation, additional_derivations, 0, is_out_data_ptr, tx_scan_info[0]);
       THROW_WALLET_EXCEPTION_IF(tx_scan_info[0].error, error::acc_outs_lookup_error, tx, tx_pub_key, m_account.get_keys());
 
       // this assumes that the miner tx pays a single address
@@ -1177,59 +1255,59 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
         for (size_t i = 1; i < tx.vout.size(); ++i)
         {
           tpool.submit(&waiter, boost::bind(&wallet2::check_acc_out_precomp, this, std::cref(tx.vout[i]), std::cref(derivation), std::cref(additional_derivations), i,
-            std::ref(tx_scan_info[i])));
+            std::cref(is_out_data_ptr), std::ref(tx_scan_info[i])), true);
         }
-        waiter.wait();
+        waiter.wait(&tpool);
         // then scan all outputs from 0
-        hwdev_lock.lock();
+        hw::device &hwdev = m_account.get_device();
+        boost::unique_lock<hw::device> hwdev_lock (hwdev);
         hwdev.set_mode(hw::device::NONE);
         for (size_t i = 0; i < tx.vout.size(); ++i)
         {
           THROW_WALLET_EXCEPTION_IF(tx_scan_info[i].error, error::acc_outs_lookup_error, tx, tx_pub_key, m_account.get_keys());
           if (tx_scan_info[i].received)
           {
-            hwdev.conceal_derivation(tx_scan_info[i].received->derivation, tx_pub_key, additional_tx_pub_keys, derivation, additional_derivations);
+            hwdev.conceal_derivation(tx_scan_info[i].received->derivation, tx_pub_key, additional_tx_pub_keys.data, derivation, additional_derivations);
             scan_output(tx, tx_pub_key, i, tx_scan_info[i], num_vouts_received, tx_money_got_in_outs, outs);
           }
         }
-        hwdev_lock.unlock();
       }
     }
-    else if (tx.vout.size() > 1 && tools::threadpool::getInstance().get_max_concurrency() > 1)
+    else if (tx.vout.size() > 1 && tools::threadpool::getInstance().get_max_concurrency() > 1 && !is_out_data_ptr)
     {
       for (size_t i = 0; i < tx.vout.size(); ++i)
       {
         tpool.submit(&waiter, boost::bind(&wallet2::check_acc_out_precomp, this, std::cref(tx.vout[i]), std::cref(derivation), std::cref(additional_derivations), i,
-            std::ref(tx_scan_info[i])));
+            std::cref(is_out_data_ptr), std::ref(tx_scan_info[i])), true);
       }
-      waiter.wait();
+      waiter.wait(&tpool);
 
-      hwdev_lock.lock();
+      hw::device &hwdev = m_account.get_device();
+      boost::unique_lock<hw::device> hwdev_lock (hwdev);
       hwdev.set_mode(hw::device::NONE);
       for (size_t i = 0; i < tx.vout.size(); ++i)
       {
         THROW_WALLET_EXCEPTION_IF(tx_scan_info[i].error, error::acc_outs_lookup_error, tx, tx_pub_key, m_account.get_keys());
         if (tx_scan_info[i].received)
         {
-          hwdev.conceal_derivation(tx_scan_info[i].received->derivation, tx_pub_key, additional_tx_pub_keys, derivation, additional_derivations);
+          hwdev.conceal_derivation(tx_scan_info[i].received->derivation, tx_pub_key, additional_tx_pub_keys.data, derivation, additional_derivations);
           scan_output(tx, tx_pub_key, i, tx_scan_info[i], num_vouts_received, tx_money_got_in_outs, outs);
         }
       }
-      hwdev_lock.unlock();
     }
     else
     {
       for (size_t i = 0; i < tx.vout.size(); ++i)
       {
-        check_acc_out_precomp(tx.vout[i], derivation, additional_derivations, i, tx_scan_info[i]);
+        check_acc_out_precomp(tx.vout[i], derivation, additional_derivations, i, is_out_data_ptr, tx_scan_info[i]);
         THROW_WALLET_EXCEPTION_IF(tx_scan_info[i].error, error::acc_outs_lookup_error, tx, tx_pub_key, m_account.get_keys());
         if (tx_scan_info[i].received)
         {
-          hwdev_lock.lock();
+          hw::device &hwdev = m_account.get_device();
+          boost::unique_lock<hw::device> hwdev_lock (hwdev);
           hwdev.set_mode(hw::device::NONE);
-          hwdev.conceal_derivation(tx_scan_info[i].received->derivation, tx_pub_key, additional_tx_pub_keys, derivation, additional_derivations);
+          hwdev.conceal_derivation(tx_scan_info[i].received->derivation, tx_pub_key, additional_tx_pub_keys.data, derivation, additional_derivations);
           scan_output(tx, tx_pub_key, i, tx_scan_info[i], num_vouts_received, tx_money_got_in_outs, outs);
-          hwdev_lock.unlock();
         }
       }
     }
@@ -1569,12 +1647,11 @@ void wallet2::process_outgoing(const crypto::hash &txid, const cryptonote::trans
   add_rings(tx);
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const crypto::hash& bl_id, uint64_t height, const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices &o_indices)
+void wallet2::process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const parsed_block &parsed_block, const crypto::hash& bl_id, uint64_t height, const std::vector<tx_cache_data> &tx_cache_data, size_t tx_cache_data_offset)
 {
-  size_t txidx = 0;
-  THROW_WALLET_EXCEPTION_IF(bche.txs.size() + 1 != o_indices.indices.size(), error::wallet_internal_error,
+  THROW_WALLET_EXCEPTION_IF(bche.txs.size() + 1 != parsed_block.o_indices.indices.size(), error::wallet_internal_error,
       "block transactions=" + std::to_string(bche.txs.size()) +
-      " not match with daemon response size=" + std::to_string(o_indices.indices.size()));
+      " not match with daemon response size=" + std::to_string(parsed_block.o_indices.indices.size()));
 
   //handle transactions from new block
     
@@ -1582,29 +1659,26 @@ void wallet2::process_new_blockchain_entry(const cryptonote::block& b, const cry
   if(b.timestamp + 60*60*24 > m_account.get_createtime() && height >= m_refresh_from_block_height)
   {
     TIME_MEASURE_START(miner_tx_handle_time);
-    process_new_transaction(get_transaction_hash(b.miner_tx), b.miner_tx, o_indices.indices[txidx++].indices, height, b.timestamp, true, false, false);
+    if (m_refresh_type != RefreshNoCoinbase)
+      process_new_transaction(get_transaction_hash(b.miner_tx), b.miner_tx, parsed_block.o_indices.indices[0].indices, height, b.timestamp, true, false, false, tx_cache_data[tx_cache_data_offset]);
+    ++tx_cache_data_offset;
     TIME_MEASURE_FINISH(miner_tx_handle_time);
 
     TIME_MEASURE_START(txs_handle_time);
     THROW_WALLET_EXCEPTION_IF(bche.txs.size() != b.tx_hashes.size(), error::wallet_internal_error, "Wrong amount of transactions for block");
-    size_t idx = 0;
-    for (const auto& txblob: bche.txs)
+    THROW_WALLET_EXCEPTION_IF(bche.txs.size() != parsed_block.txes.size(), error::wallet_internal_error, "Wrong amount of transactions for block");
+    for (size_t idx = 0; idx < b.tx_hashes.size(); ++idx)
     {
-      cryptonote::transaction tx;
-      bool r = parse_and_validate_tx_base_from_blob(txblob, tx);
-      THROW_WALLET_EXCEPTION_IF(!r, error::tx_parse_error, txblob);
-      process_new_transaction(b.tx_hashes[idx], tx, o_indices.indices[txidx++].indices, height, b.timestamp, false, false, false);
-      ++idx;
+      process_new_transaction(b.tx_hashes[idx], parsed_block.txes[idx], parsed_block.o_indices.indices[idx+1].indices, height, b.timestamp, false, false, false, tx_cache_data[tx_cache_data_offset++]);
     }
     TIME_MEASURE_FINISH(txs_handle_time);
     LOG_PRINT_L2("Processed block: " << bl_id << ", height " << height << ", " <<  miner_tx_handle_time + txs_handle_time << "(" << miner_tx_handle_time << "/" << txs_handle_time <<")ms");
   }else
   {
-    if (!(height % 100))
+    if (!(height % 128))
       LOG_PRINT_L2( "Skipped block by timestamp, height: " << height << ", block time " << b.timestamp << ", account time " << m_account.get_createtime());
   }
   m_blockchain.push_back(bl_id);
-  ++m_local_bc_height;
 
   if (0 != m_callback)
     m_callback->on_new_block(height, b);
@@ -1649,7 +1723,7 @@ void wallet2::parse_block_round(const cryptonote::blobdata &blob, cryptonote::bl
     bl_id = get_block_hash(bl);
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::pull_blocks(uint64_t start_height, uint64_t &blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::list<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices)
+void wallet2::pull_blocks(uint64_t start_height, uint64_t &blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices)
 {
   cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::request req = AUTO_VAL_INIT(req);
   cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::response res = AUTO_VAL_INIT(res);
@@ -1684,6 +1758,7 @@ void wallet2::pull_blocks(uint64_t start_height, uint64_t &blocks_start_height,
   }
 
   req.start_height = start_height;
+  req.no_miner_tx = m_refresh_type == RefreshNoCoinbase;
   m_daemon_rpc_mutex.lock();
   bool r = net_utils::invoke_http_bin("/getblocks.bin", req, res, m_http_client, rpc_timeout);
   m_daemon_rpc_mutex.unlock();
@@ -1695,11 +1770,11 @@ void wallet2::pull_blocks(uint64_t start_height, uint64_t &blocks_start_height,
       boost::lexical_cast<std::string>(res.output_indices.size()) + ") sizes from daemon");
 
   blocks_start_height = res.start_height;
-  blocks = res.blocks;
-  o_indices = res.output_indices;
+  blocks = std::move(res.blocks);
+  o_indices = std::move(res.output_indices);
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::pull_hashes(uint64_t start_height, uint64_t &blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::list<crypto::hash> &hashes)
+void wallet2::pull_hashes(uint64_t start_height, uint64_t &blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<crypto::hash> &hashes)
 {
   cryptonote::COMMAND_RPC_GET_HASHES_FAST::request req = AUTO_VAL_INIT(req);
   cryptonote::COMMAND_RPC_GET_HASHES_FAST::response res = AUTO_VAL_INIT(res);
@@ -1714,88 +1789,117 @@ void wallet2::pull_hashes(uint64_t start_height, uint64_t &blocks_start_height,
   THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::get_hashes_error, res.status);
 
   blocks_start_height = res.start_height;
-  hashes = res.m_block_ids;
+  hashes = std::move(res.m_block_ids);
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::process_blocks(uint64_t start_height, const std::list<cryptonote::block_complete_entry> &blocks, const std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices, uint64_t& blocks_added)
+void wallet2::process_parsed_blocks(uint64_t start_height, const std::vector<cryptonote::block_complete_entry> &blocks, const std::vector<parsed_block> &parsed_blocks, uint64_t& blocks_added)
 {
   size_t current_index = start_height;
   blocks_added = 0;
-  size_t tx_o_indices_idx = 0;
 
-  THROW_WALLET_EXCEPTION_IF(blocks.size() != o_indices.size(), error::wallet_internal_error, "size mismatch");
+  THROW_WALLET_EXCEPTION_IF(blocks.size() != parsed_blocks.size(), error::wallet_internal_error, "size mismatch");
   THROW_WALLET_EXCEPTION_IF(!m_blockchain.is_in_bounds(current_index), error::wallet_internal_error, "Index out of bounds of hashchain");
 
   tools::threadpool& tpool = tools::threadpool::getInstance();
-  int threads = tpool.get_max_concurrency();
-  if (threads > 1)
+  tools::threadpool::waiter waiter;
+
+  size_t num_txes = 0;
+  std::vector<tx_cache_data> tx_cache_data;
+  for (size_t i = 0; i < blocks.size(); ++i)
+    num_txes += 1 + parsed_blocks[i].txes.size();
+  tx_cache_data.resize(num_txes);
+  size_t txidx = 0;
+  for (size_t i = 0; i < blocks.size(); ++i)
   {
-    std::vector<crypto::hash> round_block_hashes(threads);
-    std::vector<cryptonote::block> round_blocks(threads);
-    std::deque<bool> error(threads);
-    size_t blocks_size = blocks.size();
-    std::list<block_complete_entry>::const_iterator blocki = blocks.begin();
-    for (size_t b = 0; b < blocks_size; b += threads)
+    THROW_WALLET_EXCEPTION_IF(parsed_blocks[i].txes.size() != parsed_blocks[i].block.tx_hashes.size(),
+        error::wallet_internal_error, "Mismatched parsed_blocks[i].txes.size() and parsed_blocks[i].block.tx_hashes.size()");
+    if (m_refresh_type != RefreshNoCoinbase)
+      tpool.submit(&waiter, [&, i, txidx](){ cache_tx_data(parsed_blocks[i].block.miner_tx, get_transaction_hash(parsed_blocks[i].block.miner_tx), tx_cache_data[txidx]); });
+    ++txidx;
+    for (size_t idx = 0; idx < parsed_blocks[i].txes.size(); ++idx)
     {
-      size_t round_size = std::min((size_t)threads, blocks_size - b);
-      tools::threadpool::waiter waiter;
+      tpool.submit(&waiter, [&, i, idx, txidx](){ cache_tx_data(parsed_blocks[i].txes[idx], parsed_blocks[i].block.tx_hashes[idx], tx_cache_data[txidx]); });
+      ++txidx;
+    }
+  }
+  THROW_WALLET_EXCEPTION_IF(txidx != num_txes, error::wallet_internal_error, "txidx does not match tx_cache_data size");
+  waiter.wait(&tpool);
 
-      std::list<block_complete_entry>::const_iterator tmpblocki = blocki;
-      for (size_t i = 0; i < round_size; ++i)
-      {
-        tpool.submit(&waiter, boost::bind(&wallet2::parse_block_round, this, std::cref(tmpblocki->block),
-          std::ref(round_blocks[i]), std::ref(round_block_hashes[i]), std::ref(error[i])));
-        ++tmpblocki;
-      }
-      waiter.wait();
-      tmpblocki = blocki;
-      for (size_t i = 0; i < round_size; ++i)
-      {
-        THROW_WALLET_EXCEPTION_IF(error[i], error::block_parse_error, tmpblocki->block);
-        ++tmpblocki;
-      }
-      for (size_t i = 0; i < round_size; ++i)
-      {
-        const crypto::hash &bl_id = round_block_hashes[i];
-        cryptonote::block &bl = round_blocks[i];
+  hw::device &hwdev =  m_account.get_device();
+  hw::reset_mode rst(hwdev);
+  hwdev.set_mode(hw::device::TRANSACTION_PARSE);
+  const cryptonote::account_keys &keys = m_account.get_keys();
 
-        if(current_index >= m_blockchain.size())
-        {
-          process_new_blockchain_entry(bl, *blocki, bl_id, current_index, o_indices[b+i]);
-          ++blocks_added;
-        }
-        else if(bl_id != m_blockchain[current_index])
-        {
-          //split detected here !!!
-          THROW_WALLET_EXCEPTION_IF(current_index == start_height, error::wallet_internal_error,
-            "wrong daemon response: split starts from the first block in response " + string_tools::pod_to_hex(bl_id) +
-            " (height " + std::to_string(start_height) + "), local block id at this height: " +
-            string_tools::pod_to_hex(m_blockchain[current_index]));
-
-          detach_blockchain(current_index);
-          process_new_blockchain_entry(bl, *blocki, bl_id, current_index, o_indices[b+i]);
-        }
-        else
+  auto gender = [&](wallet2::is_out_data &iod) {
+    boost::unique_lock<hw::device> hwdev_lock(hwdev);
+    if (!hwdev.generate_key_derivation(iod.pkey, keys.m_view_secret_key, iod.derivation))
+    {
+      MWARNING("Failed to generate key derivation from tx pubkey, skipping");
+      static_assert(sizeof(iod.derivation) == sizeof(rct::key), "Mismatched sizes of key_derivation and rct::key");
+      memcpy(&iod.derivation, rct::identity().bytes, sizeof(iod.derivation));
+    }
+  };
+
+  for (auto &slot: tx_cache_data)
+  {
+    for (auto &iod: slot.primary)
+      tpool.submit(&waiter, [&gender, &iod]() { gender(iod); }, true);
+    for (auto &iod: slot.additional)
+      tpool.submit(&waiter, [&gender, &iod]() { gender(iod); }, true);
+  }
+  waiter.wait(&tpool);
+
+  auto geniod = [&](const cryptonote::transaction &tx, size_t n_vouts, size_t txidx) {
+    for (size_t k = 0; k < n_vouts; ++k)
+    {
+      const auto &o = tx.vout[k];
+      if (o.target.type() == typeid(cryptonote::txout_to_key))
+      {
+        std::vector<crypto::key_derivation> additional_derivations;
+        for (const auto &iod: tx_cache_data[txidx].additional)
+          additional_derivations.push_back(iod.derivation);
+        const auto &key = boost::get<txout_to_key>(o.target).key;
+        for (size_t l = 0; l < tx_cache_data[txidx].primary.size(); ++l)
         {
-          LOG_PRINT_L2("Block is already in blockchain: " << string_tools::pod_to_hex(bl_id));
+          THROW_WALLET_EXCEPTION_IF(tx_cache_data[txidx].primary[l].received.size() != n_vouts,
+              error::wallet_internal_error, "Unexpected received array size");
+          tx_cache_data[txidx].primary[l].received[k] = is_out_to_acc_precomp(m_subaddresses, key, tx_cache_data[txidx].primary[l].derivation, additional_derivations, k, hwdev);
+          additional_derivations.clear();
         }
-        ++current_index;
-        ++blocki;
       }
     }
-  }
-  else
+  };
+
+  txidx = 0;
+  for (size_t i = 0; i < blocks.size(); ++i)
   {
-  for(auto& bl_entry: blocks)
+    if (m_refresh_type != RefreshType::RefreshNoCoinbase)
+    {
+      THROW_WALLET_EXCEPTION_IF(txidx >= tx_cache_data.size(), error::wallet_internal_error, "txidx out of range");
+      const size_t n_vouts = m_refresh_type == RefreshType::RefreshOptimizeCoinbase ? 1 : parsed_blocks[i].block.miner_tx.vout.size();
+      tpool.submit(&waiter, [&, i, txidx](){ geniod(parsed_blocks[i].block.miner_tx, n_vouts, txidx); }, true);
+    }
+    ++txidx;
+    for (size_t j = 0; j < parsed_blocks[i].txes.size(); ++j)
+    {
+      THROW_WALLET_EXCEPTION_IF(txidx >= tx_cache_data.size(), error::wallet_internal_error, "txidx out of range");
+      tpool.submit(&waiter, [&, i, j, txidx](){ geniod(parsed_blocks[i].txes[j], parsed_blocks[i].txes[j].vout.size(), txidx); }, true);
+      ++txidx;
+    }
+  }
+  THROW_WALLET_EXCEPTION_IF(txidx != tx_cache_data.size(), error::wallet_internal_error, "txidx did not reach expected value");
+  waiter.wait(&tpool);
+  hwdev.set_mode(hw::device::NONE);
+
+  size_t tx_cache_data_offset = 0;
+  for (size_t i = 0; i < blocks.size(); ++i)
   {
-    cryptonote::block bl;
-    bool r = cryptonote::parse_and_validate_block_from_blob(bl_entry.block, bl);
-    THROW_WALLET_EXCEPTION_IF(!r, error::block_parse_error, bl_entry.block);
+    const crypto::hash &bl_id = parsed_blocks[i].hash;
+    const cryptonote::block &bl = parsed_blocks[i].block;
 
-    crypto::hash bl_id = get_block_hash(bl);
     if(current_index >= m_blockchain.size())
     {
-      process_new_blockchain_entry(bl, bl_entry, bl_id, current_index, o_indices[tx_o_indices_idx]);
+      process_new_blockchain_entry(bl, blocks[i], parsed_blocks[i], bl_id, current_index, tx_cache_data, tx_cache_data_offset);
       ++blocks_added;
     }
     else if(bl_id != m_blockchain[current_index])
@@ -1807,16 +1911,14 @@ void wallet2::process_blocks(uint64_t start_height, const std::list<cryptonote::
         string_tools::pod_to_hex(m_blockchain[current_index]));
 
       detach_blockchain(current_index);
-      process_new_blockchain_entry(bl, bl_entry, bl_id, current_index, o_indices[tx_o_indices_idx]);
+      process_new_blockchain_entry(bl, blocks[i], parsed_blocks[i], bl_id, current_index, tx_cache_data, tx_cache_data_offset);
     }
     else
     {
       LOG_PRINT_L2("Block is already in blockchain: " << string_tools::pod_to_hex(bl_id));
     }
-
     ++current_index;
-    ++tx_o_indices_idx;
-  }
+    tx_cache_data_offset += 1 + parsed_blocks[i].txes.size();
   }
 }
 //----------------------------------------------------------------------------------------------------
@@ -1832,7 +1934,7 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched)
   refresh(start_height, blocks_fetched, received_money);
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::pull_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::list<cryptonote::block_complete_entry> &prev_blocks, std::list<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices, bool &error)
+void wallet2::pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::vector<cryptonote::block_complete_entry> &prev_blocks, const std::vector<parsed_block> &prev_parsed_blocks, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<parsed_block> &parsed_blocks, bool &error)
 {
   error = false;
 
@@ -1841,18 +1943,53 @@ void wallet2::pull_next_blocks(uint64_t start_height, uint64_t &blocks_start_hei
     drop_from_short_history(short_chain_history, 3);
 
     // prepend the last 3 blocks, should be enough to guard against a block or two's reorg
-    cryptonote::block bl;
-    std::list<cryptonote::block_complete_entry>::const_reverse_iterator i = prev_blocks.rbegin();
+    std::vector<parsed_block>::const_reverse_iterator i = prev_parsed_blocks.rbegin();
     for (size_t n = 0; n < std::min((size_t)3, prev_blocks.size()); ++n)
     {
-      bool ok = cryptonote::parse_and_validate_block_from_blob(i->block, bl);
-      THROW_WALLET_EXCEPTION_IF(!ok, error::block_parse_error, i->block);
-      short_chain_history.push_front(cryptonote::get_block_hash(bl));
+      short_chain_history.push_front(i->hash);
       ++i;
     }
 
     // pull the new blocks
+    std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> o_indices;
     pull_blocks(start_height, blocks_start_height, short_chain_history, blocks, o_indices);
+    THROW_WALLET_EXCEPTION_IF(blocks.size() != o_indices.size(), error::wallet_internal_error, "Mismatched sizes of blocks and o_indices");
+
+    tools::threadpool& tpool = tools::threadpool::getInstance();
+    tools::threadpool::waiter waiter;
+    parsed_blocks.resize(blocks.size());
+    for (size_t i = 0; i < blocks.size(); ++i)
+    {
+      tpool.submit(&waiter, boost::bind(&wallet2::parse_block_round, this, std::cref(blocks[i].block),
+        std::ref(parsed_blocks[i].block), std::ref(parsed_blocks[i].hash), std::ref(parsed_blocks[i].error)), true);
+    }
+    waiter.wait(&tpool);
+    for (size_t i = 0; i < blocks.size(); ++i)
+    {
+      if (parsed_blocks[i].error)
+      {
+        error = true;
+        break;
+      }
+      parsed_blocks[i].o_indices = std::move(o_indices[i]);
+    }
+
+    boost::mutex error_lock;
+    for (size_t i = 0; i < blocks.size(); ++i)
+    {
+      parsed_blocks[i].txes.resize(blocks[i].txs.size());
+      for (size_t j = 0; j < blocks[i].txs.size(); ++j)
+      {
+        tpool.submit(&waiter, [&, i, j](){
+          if (!parse_and_validate_tx_base_from_blob(blocks[i].txs[j], parsed_blocks[i].txes[j]))
+          {
+            boost::unique_lock<boost::mutex> lock(error_lock);
+            error = true;
+          }
+        }, true);
+      }
+    }
+    waiter.wait(&tpool);
   }
   catch(...)
   {
@@ -2065,7 +2202,7 @@ void wallet2::update_pool_state(bool refreshed)
                     [tx_hash](const std::pair<crypto::hash, bool> &e) { return e.first == tx_hash; });
                 if (i != txids.end())
                 {
-                  process_new_transaction(tx_hash, tx, std::vector<uint64_t>(), 0, time(NULL), false, true, tx_entry.double_spend_seen);
+                  process_new_transaction(tx_hash, tx, std::vector<uint64_t>(), 0, time(NULL), false, true, tx_entry.double_spend_seen, {});
                   m_scanned_pool_txs[0].insert(tx_hash);
                   if (m_scanned_pool_txs[0].size() > 5000)
                   {
@@ -2109,7 +2246,7 @@ void wallet2::update_pool_state(bool refreshed)
 //----------------------------------------------------------------------------------------------------
 void wallet2::fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history)
 {
-  std::list<crypto::hash> hashes;
+  std::vector<crypto::hash> hashes;
 
   const uint64_t checkpoint_height = m_checkpoints.get_max_height();
   if (stop_height > checkpoint_height && m_blockchain.size()-1 < checkpoint_height)
@@ -2119,7 +2256,6 @@ void wallet2::fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height,
     while (missing_blocks-- > 0)
       m_blockchain.push_back(crypto::null_hash); // maybe a bit suboptimal, but deque won't do huge reallocs like vector
     m_blockchain.push_back(m_checkpoints.get_points().at(checkpoint_height));
-    m_local_bc_height = m_blockchain.size();
     short_chain_history.clear();
     get_short_chain_history(short_chain_history);
   }
@@ -2137,7 +2273,7 @@ void wallet2::fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height,
     }
     if (hashes.size() + current_index < stop_height) {
       drop_from_short_history(short_chain_history, 3);
-      std::list<crypto::hash>::iterator right = hashes.end();
+      std::vector<crypto::hash>::iterator right = hashes.end();
       // prepend 3 more
       for (int i = 0; i<3; i++) {
         right--;
@@ -2149,10 +2285,9 @@ void wallet2::fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height,
     {
       if(current_index >= m_blockchain.size())
       {
-        if (!(current_index % 1000))
+        if (!(current_index % 1024))
           LOG_PRINT_L2( "Skipped block by height: " << current_index);
         m_blockchain.push_back(bl_id);
-        ++m_local_bc_height;
 
         if (0 != m_callback)
         { // FIXME: this isn't right, but simplewallet just logs that we got a block.
@@ -2200,6 +2335,8 @@ bool wallet2::delete_address_book_row(std::size_t row_id) {
 //----------------------------------------------------------------------------------------------------
 void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& received_money)
 {
+  key_ref kref(*this);
+
   if(m_light_wallet) {
 
     // MyMonero get_address_info needs to be called occasionally to trigger wallet sync.
@@ -2213,7 +2350,6 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
       // Update lw heights
       m_light_wallet_scanned_block_height = res.scanned_block_height;
       m_light_wallet_blockchain_height = res.blockchain_height;
-      m_local_bc_height = res.blockchain_height;
       // If new height - call new_block callback
       if(m_light_wallet_blockchain_height != prev_height)
       {
@@ -2242,8 +2378,8 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
   tools::threadpool& tpool = tools::threadpool::getInstance();
   tools::threadpool::waiter waiter;
   uint64_t blocks_start_height;
-  std::list<cryptonote::block_complete_entry> blocks;
-  std::vector<COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> o_indices;
+  std::vector<cryptonote::block_complete_entry> blocks;
+  std::vector<parsed_block> parsed_blocks;
   bool refreshed = false;
 
   // pull the first set of blocks
@@ -2264,31 +2400,34 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
   // If stop() is called during fast refresh we don't need to continue
   if(!m_run.load(std::memory_order_relaxed))
     return;
-  pull_blocks(start_height, blocks_start_height, short_chain_history, blocks, o_indices);
   // always reset start_height to 0 to force short_chain_ history to be used on
   // subsequent pulls in this refresh.
   start_height = 0;
 
+  bool first = true;
   while(m_run.load(std::memory_order_relaxed))
   {
     try
     {
       // pull the next set of blocks while we're processing the current one
       uint64_t next_blocks_start_height;
-      std::list<cryptonote::block_complete_entry> next_blocks;
-      std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> next_o_indices;
+      std::vector<cryptonote::block_complete_entry> next_blocks;
+      std::vector<parsed_block> next_parsed_blocks;
       bool error = false;
-      if (blocks.empty())
+      if (!first && blocks.empty())
       {
         refreshed = false;
         break;
       }
-      tpool.submit(&waiter, [&]{pull_next_blocks(start_height, next_blocks_start_height, short_chain_history, blocks, next_blocks, next_o_indices, error);});
+      tpool.submit(&waiter, [&]{pull_and_parse_next_blocks(start_height, next_blocks_start_height, short_chain_history, blocks, parsed_blocks, next_blocks, next_parsed_blocks, error);});
 
-      process_blocks(blocks_start_height, blocks, o_indices, added_blocks);
-      blocks_fetched += added_blocks;
-      waiter.wait();
-      if(blocks_start_height == next_blocks_start_height)
+      if (!first)
+      {
+        process_parsed_blocks(blocks_start_height, blocks, parsed_blocks, added_blocks);
+        blocks_fetched += added_blocks;
+      }
+      waiter.wait(&tpool);
+      if(!first && blocks_start_height == next_blocks_start_height)
       {
         m_node_rpc_proxy.set_height(m_blockchain.size());
         refreshed = true;
@@ -2297,8 +2436,9 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
 
       // switch to the new blocks from the daemon
       blocks_start_height = next_blocks_start_height;
-      blocks = next_blocks;
-      o_indices = next_o_indices;
+      blocks = std::move(next_blocks);
+      parsed_blocks = std::move(next_parsed_blocks);
+      first = false;
 
       // handle error from async fetching thread
       if (error)
@@ -2309,7 +2449,7 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
     catch (const std::exception&)
     {
       blocks_fetched += added_blocks;
-      waiter.wait();
+      waiter.wait(&tpool);
       if(try_count < 3)
       {
         LOG_PRINT_L1("Another try pull_blocks (try_count=" << try_count << ")...");
@@ -2464,7 +2604,6 @@ void wallet2::detach_blockchain(uint64_t height)
 
   size_t blocks_detached = m_blockchain.size() - height;
   m_blockchain.crop(height);
-  m_local_bc_height -= blocks_detached;
 
   for (auto it = m_payments.begin(); it != m_payments.end(); )
   {
@@ -2506,7 +2645,6 @@ bool wallet2::clear()
   m_scanned_pool_txs[0].clear();
   m_scanned_pool_txs[1].clear();
   m_address_book.clear();
-  m_local_bc_height = 1;
   m_subaddresses.clear();
   m_subaddress_labels.clear();
   return true;
@@ -3888,8 +4026,6 @@ void wallet2::load(const std::string& wallet_, const epee::wipeable_string& pass
   if (get_num_subaddress_accounts() == 0)
     add_subaddress_account(tr("Primary account"));
 
-  m_local_bc_height = m_blockchain.size();
-
   try
   {
     find_and_save_rings(false);
@@ -4269,7 +4405,6 @@ void wallet2::rescan_blockchain(bool refresh)
   crypto::hash genesis_hash = get_block_hash(genesis);
   m_blockchain.push_back(genesis_hash);
   add_subaddress_account(tr("Primary account"));
-  m_local_bc_height = 1;
 
   if (refresh)
     this->refresh();
@@ -4285,7 +4420,7 @@ bool wallet2::is_transfer_unlocked(uint64_t unlock_time, uint64_t block_height)
   if(!is_tx_spendtime_unlocked(unlock_time, block_height))
     return false;
 
-  if(block_height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE > m_local_bc_height)
+  if(block_height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE > get_blockchain_current_height())
     return false;
 
   return true;
@@ -4296,7 +4431,7 @@ bool wallet2::is_tx_spendtime_unlocked(uint64_t unlock_time, uint64_t block_heig
   if(unlock_time < CRYPTONOTE_MAX_BLOCK_NUMBER)
   {
     //interpret as block index
-    if(m_local_bc_height-1 + CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS >= unlock_time)
+    if(get_blockchain_current_height()-1 + CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS >= unlock_time)
       return true;
     else
       return false;
@@ -5629,6 +5764,24 @@ bool wallet2::set_ring_database(const std::string &filename)
   return true;
 }
 
+crypto::chacha_key wallet2::get_ringdb_key()
+{
+  if (!m_ringdb_key)
+  {
+    MINFO("caching ringdb key");
+    crypto::chacha_key key;
+    generate_chacha_key_from_secret_keys(key);
+    m_ringdb_key = key;
+  }
+  return *m_ringdb_key;
+}
+
+void wallet2::clear_ringdb_key()
+{
+  MINFO("clearing ringdb key");
+  m_ringdb_key = boost::none;
+}
+
 bool wallet2::add_rings(const crypto::chacha_key &key, const cryptonote::transaction_prefix &tx)
 {
   if (!m_ringdb)
@@ -5639,9 +5792,8 @@ bool wallet2::add_rings(const crypto::chacha_key &key, const cryptonote::transac
 
 bool wallet2::add_rings(const cryptonote::transaction_prefix &tx)
 {
-  crypto::chacha_key key;
-  generate_chacha_key_from_secret_keys(key);
-  try { return add_rings(key, tx); }
+  key_ref kref(*this);
+  try { return add_rings(get_ringdb_key(), tx); }
   catch (const std::exception &e) { return false; }
 }
 
@@ -5649,9 +5801,8 @@ bool wallet2::remove_rings(const cryptonote::transaction_prefix &tx)
 {
   if (!m_ringdb)
     return false;
-  crypto::chacha_key key;
-  generate_chacha_key_from_secret_keys(key);
-  try { return m_ringdb->remove_rings(key, tx); }
+  key_ref kref(*this);
+  try { return m_ringdb->remove_rings(get_ringdb_key(), tx); }
   catch (const std::exception &e) { return false; }
 }
 
@@ -5688,10 +5839,8 @@ bool wallet2::get_rings(const crypto::hash &txid, std::vector<std::pair<crypto::
 
 bool wallet2::get_ring(const crypto::key_image &key_image, std::vector<uint64_t> &outs)
 {
-  crypto::chacha_key key;
-  generate_chacha_key_from_secret_keys(key);
-
-  try { return get_ring(key, key_image, outs); }
+  key_ref kref(*this);
+  try { return get_ring(get_ringdb_key(), key_image, outs); }
   catch (const std::exception &e) { return false; }
 }
 
@@ -5700,10 +5849,8 @@ bool wallet2::set_ring(const crypto::key_image &key_image, const std::vector<uin
   if (!m_ringdb)
     return false;
 
-  crypto::chacha_key key;
-  generate_chacha_key_from_secret_keys(key);
-
-  try { return m_ringdb->set_ring(key, key_image, outs, relative); }
+  key_ref kref(*this);
+  try { return m_ringdb->set_ring(get_ringdb_key(), key_image, outs, relative); }
   catch (const std::exception &e) { return false; }
 }
 
@@ -5714,6 +5861,7 @@ bool wallet2::find_and_save_rings(bool force)
   if (!m_ringdb)
     return false;
 
+  key_ref kref(*this);
   COMMAND_RPC_GET_TRANSACTIONS::request req = AUTO_VAL_INIT(req);
   COMMAND_RPC_GET_TRANSACTIONS::response res = AUTO_VAL_INIT(res);
 
@@ -5731,9 +5879,6 @@ bool wallet2::find_and_save_rings(bool force)
 
   MDEBUG("Found " << std::to_string(txs_hashes.size()) << " transactions");
 
-  crypto::chacha_key key;
-  generate_chacha_key_from_secret_keys(key);
-
   // get those transactions from the daemon
   static const size_t SLICE_SIZE = 200;
   for (size_t slice = 0; slice < txs_hashes.size(); slice += SLICE_SIZE)
@@ -5770,7 +5915,7 @@ bool wallet2::find_and_save_rings(bool force)
     crypto::hash tx_hash, tx_prefix_hash;
     THROW_WALLET_EXCEPTION_IF(!cryptonote::parse_and_validate_tx_from_blob(bd, tx, tx_hash, tx_prefix_hash), error::wallet_internal_error, "failed to parse tx from blob");
     THROW_WALLET_EXCEPTION_IF(epee::string_tools::pod_to_hex(tx_hash) != tx_info.tx_hash, error::wallet_internal_error, "txid mismatch");
-    THROW_WALLET_EXCEPTION_IF(!add_rings(key, tx), error::wallet_internal_error, "Failed to save ring");
+    THROW_WALLET_EXCEPTION_IF(!add_rings(get_ringdb_key(), tx), error::wallet_internal_error, "Failed to save ring");
     }
   }
 
@@ -5949,9 +6094,6 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
     return;
   }
 
-  crypto::chacha_key key;
-  generate_chacha_key_from_secret_keys(key);
-
   if (fake_outputs_count > 0)
   {
     uint64_t segregation_fork_height = get_segregation_fork_height();
@@ -6129,7 +6271,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
       if (td.m_key_image_known && !td.m_key_image_partial)
       {
         std::vector<uint64_t> ring;
-        if (get_ring(key, td.m_key_image, ring))
+        if (get_ring(get_ringdb_key(), td.m_key_image, ring))
         {
           MINFO("This output has a known ring, reusing (size " << ring.size() << ")");
           THROW_WALLET_EXCEPTION_IF(ring.size() > fake_outputs_count + 1, error::wallet_internal_error,
@@ -6321,7 +6463,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
       if (td.m_key_image_known && !td.m_key_image_partial)
       {
         std::vector<uint64_t> ring;
-        if (get_ring(key, td.m_key_image, ring))
+        if (get_ring(get_ringdb_key(), td.m_key_image, ring))
         {
           for (uint64_t out: ring)
           {
@@ -9864,7 +10006,6 @@ void wallet2::import_blockchain(const std::tuple<size_t, crypto::hash, std::vect
   generate_genesis(genesis);
   crypto::hash genesis_hash = get_block_hash(genesis);
   check_genesis(genesis_hash);
-  m_local_bc_height = m_blockchain.size();
 }
 //----------------------------------------------------------------------------------------------------
 std::vector<tools::wallet2::transfer_details> wallet2::export_outputs() const
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index 7f214be35..2da6dd21a 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -454,6 +454,39 @@ namespace tools
 
     typedef std::tuple<uint64_t, crypto::public_key, rct::key> get_outs_entry;
 
+    struct parsed_block
+    {
+      crypto::hash hash;
+      cryptonote::block block;
+      std::vector<cryptonote::transaction> txes;
+      cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices o_indices;
+      bool error;
+    };
+
+    struct is_out_data
+    {
+      crypto::public_key pkey;
+      crypto::key_derivation derivation;
+      std::vector<boost::optional<cryptonote::subaddress_receive_info>> received;
+    };
+
+    struct tx_cache_data
+    {
+      std::vector<cryptonote::tx_extra_field> tx_extra_fields;
+      std::vector<is_out_data> primary;
+      std::vector<is_out_data> additional;
+    };
+
+    struct key_ref
+    {
+      key_ref(tools::wallet2 &w): wallet(w) { ++refs; }
+      ~key_ref() { if (!--refs) wallet.clear_ringdb_key(); }
+
+    private:
+      tools::wallet2 &wallet;
+      static std::atomic<unsigned int> refs;
+    };
+
     /*!
      * \brief  Generates a wallet or restores one.
      * \param  wallet_              Name of wallet file
@@ -724,7 +757,7 @@ namespace tools
     void get_unconfirmed_payments_out(std::list<std::pair<crypto::hash,wallet2::unconfirmed_transfer_details>>& unconfirmed_payments, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
     void get_unconfirmed_payments(std::list<std::pair<crypto::hash,wallet2::pool_payment_details>>& unconfirmed_payments, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
 
-    uint64_t get_blockchain_current_height() const { return m_local_bc_height; }
+    uint64_t get_blockchain_current_height() const { return m_light_wallet_blockchain_height ? m_light_wallet_blockchain_height : m_blockchain.size(); }
     void rescan_spent();
     void rescan_blockchain(bool refresh = true);
     bool is_transfer_unlocked(const transfer_details& td) const;
@@ -1119,17 +1152,17 @@ namespace tools
      * \param password       Password of wallet file
      */
     bool load_keys(const std::string& keys_file_name, const epee::wipeable_string& password);
-    void process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen);
-    void process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const crypto::hash& bl_id, uint64_t height, const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices &o_indices);
+    void process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen, const tx_cache_data &tx_cache_data);
+    void process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const parsed_block &parsed_block, const crypto::hash& bl_id, uint64_t height, const std::vector<tx_cache_data> &tx_cache_data, size_t tx_cache_data_offset);
     void detach_blockchain(uint64_t height);
     void get_short_chain_history(std::list<crypto::hash>& ids) const;
     bool is_tx_spendtime_unlocked(uint64_t unlock_time, uint64_t block_height) const;
     bool clear();
-    void pull_blocks(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::list<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices);
-    void pull_hashes(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::list<crypto::hash> &hashes);
+    void pull_blocks(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices);
+    void pull_hashes(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<crypto::hash> &hashes);
     void fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history);
-    void pull_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::list<cryptonote::block_complete_entry> &prev_blocks, std::list<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices, bool &error);
-    void process_blocks(uint64_t start_height, const std::list<cryptonote::block_complete_entry> &blocks, const std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices, uint64_t& blocks_added);
+    void pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::vector<cryptonote::block_complete_entry> &prev_blocks, const std::vector<parsed_block> &prev_parsed_blocks, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<parsed_block> &parsed_blocks, bool &error);
+    void process_parsed_blocks(uint64_t start_height, const std::vector<cryptonote::block_complete_entry> &blocks, const std::vector<parsed_block> &parsed_blocks, uint64_t& blocks_added);
     uint64_t select_transfers(uint64_t needed_money, std::vector<size_t> unused_transfers_indices, std::vector<size_t>& selected_transfers, bool trusted_daemon) const;
     bool prepare_file_names(const std::string& file_path);
     void process_unconfirmed(const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t height);
@@ -1140,6 +1173,7 @@ namespace tools
     bool generate_chacha_key_from_secret_keys(crypto::chacha_key &key) const;
     crypto::hash get_payment_id(const pending_tx &ptx) const;
     void check_acc_out_precomp(const cryptonote::tx_out &o, const crypto::key_derivation &derivation, const std::vector<crypto::key_derivation> &additional_derivations, size_t i, tx_scan_info_t &tx_scan_info) const;
+    void check_acc_out_precomp(const cryptonote::tx_out &o, const crypto::key_derivation &derivation, const std::vector<crypto::key_derivation> &additional_derivations, size_t i, const is_out_data *is_out_data, tx_scan_info_t &tx_scan_info) const;
     void parse_block_round(const cryptonote::blobdata &blob, cryptonote::block &bl, crypto::hash &bl_id, bool &error) const;
     uint64_t get_upper_transaction_size_limit() const;
     std::vector<uint64_t> get_unspent_amounts_vector() const;
@@ -1164,11 +1198,16 @@ namespace tools
     bool add_rings(const cryptonote::transaction_prefix &tx);
     bool remove_rings(const cryptonote::transaction_prefix &tx);
     bool get_ring(const crypto::chacha_key &key, const crypto::key_image &key_image, std::vector<uint64_t> &outs);
+    crypto::chacha_key get_ringdb_key();
+    void cache_ringdb_key();
+    void clear_ringdb_key();
 
     bool get_output_distribution(uint64_t &start_height, std::vector<uint64_t> &distribution);
 
     uint64_t get_segregation_fork_height() const;
 
+    void cache_tx_data(const cryptonote::transaction& tx, const crypto::hash &txid, tx_cache_data &tx_cache_data) const;
+
     cryptonote::account_base m_account;
     boost::optional<epee::net_utils::http::login> m_daemon_login;
     std::string m_daemon_address;
@@ -1176,7 +1215,6 @@ namespace tools
     std::string m_keys_file;
     epee::net_utils::http::http_simple_client m_http_client;
     hashchain m_blockchain;
-    std::atomic<uint64_t> m_local_bc_height; //temporary workaround
     std::unordered_map<crypto::hash, unconfirmed_transfer_details> m_unconfirmed_txs;
     std::unordered_map<crypto::hash, confirmed_transfer_details> m_confirmed_txs;
     std::unordered_multimap<crypto::hash, pool_payment_details> m_unconfirmed_payments;
@@ -1259,6 +1297,7 @@ namespace tools
     std::string m_ring_database;
     bool m_ring_history_saved;
     std::unique_ptr<ringdb> m_ringdb;
+    boost::optional<crypto::chacha_key> m_ringdb_key;
   };
 }
 BOOST_CLASS_VERSION(tools::wallet2, 24)