From ed2c81ed95be71bace897e62a0c241068cfde7be Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Mon, 16 Apr 2018 00:16:02 +0100
Subject: replace std::list with std::vector on some hot paths

also use reserve where appropriate
---
 src/rpc/daemon_handler.cpp | 30 +++++++-----------------------
 1 file changed, 7 insertions(+), 23 deletions(-)

(limited to 'src/rpc/daemon_handler.cpp')

diff --git a/src/rpc/daemon_handler.cpp b/src/rpc/daemon_handler.cpp
index 39f169cdf..582a3440b 100644
--- a/src/rpc/daemon_handler.cpp
+++ b/src/rpc/daemon_handler.cpp
@@ -50,7 +50,7 @@ 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<blobdata, std::vector<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))
     {
@@ -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;
@@ -89,7 +86,7 @@ namespace rpc
           res.error_details = "incorrect number of transactions retrieved for block";
           return;
       }
-      std::list<transaction> txs;
+      std::vector<transaction> txs;
       for (const auto& blob : it->second)
       {
         txs.resize(txs.size() + 1);
@@ -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);
 
-- 
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