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| author | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2019-03-26 11:51:13 +0000 |
|---|---|---|
| committer | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2019-03-28 18:07:57 +0000 |
| commit | 9b687c7873f297b23e643a43b09193d2bdb5e095 (patch) | |
| tree | aeb7a3c0ea265d2a7e7a93969802dde6504c3ab0 /src/cryptonote_core/blockchain.cpp | |
| parent | Merge pull request #5286 (diff) | |
| download | monero-9b687c7873f297b23e643a43b09193d2bdb5e095.tar.xz | |
blockchain: simple cache for the long term block weights
Diffstat (limited to 'src/cryptonote_core/blockchain.cpp')
| -rw-r--r-- | src/cryptonote_core/blockchain.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp index f5bd9bbb5..8346d5d00 100644 --- a/src/cryptonote_core/blockchain.cpp +++ b/src/cryptonote_core/blockchain.cpp @@ -178,6 +178,7 @@ Blockchain::Blockchain(tx_memory_pool& tx_pool) : m_enforce_dns_checkpoints(false), m_max_prepare_blocks_threads(4), m_db_sync_on_blocks(true), m_db_sync_threshold(1), m_db_sync_mode(db_async), m_db_default_sync(false), m_fast_sync(true), m_show_time_stats(false), m_sync_counter(0), m_bytes_to_sync(0), m_cancel(false), m_long_term_block_weights_window(CRYPTONOTE_LONG_TERM_BLOCK_WEIGHT_WINDOW_SIZE), m_long_term_effective_median_block_weight(0), + m_long_term_block_weights_cache_tip_hash(crypto::null_hash), m_difficulty_for_next_block_top_hash(crypto::null_hash), m_difficulty_for_next_block(1), m_btc_valid(false) @@ -1279,7 +1280,28 @@ void Blockchain::get_long_term_block_weights(std::vector<uint64_t>& weights, uin LOG_PRINT_L3("Blockchain::" << __func__); CRITICAL_REGION_LOCAL(m_blockchain_lock); + if (count == 0) + return; + + bool cached = false; + uint64_t blockchain_height = m_db->height(); + uint64_t tip_height = start_height + count - 1; + crypto::hash tip_hash = crypto::null_hash; + if (tip_height < blockchain_height && count == m_long_term_block_weights_cache.size()) + { + tip_hash = m_db->get_block_hash_from_height(tip_height); + cached = tip_hash == m_long_term_block_weights_cache_tip_hash; + } + + if (cached) + { + weights = m_long_term_block_weights_cache; + return; + } + weights = m_db->get_long_term_block_weights(start_height, count); + m_long_term_block_weights_cache = weights; + m_long_term_block_weights_cache_tip_hash = tip_hash; } //------------------------------------------------------------------ uint64_t Blockchain::get_current_cumulative_block_weight_limit() const |