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blockchain: more opportunities for caching the rolling median

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Crypto City 2024-08-15 13:46:58 +00:00 committed by moneromooo-monero
parent a1dc85c537
commit cfb19b932f
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1 changed files with 10 additions and 3 deletions
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13
src/cryptonote_core/blockchain.cpp
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@ -1486,10 +1486,13 @@ uint64_t Blockchain::get_long_term_block_weight_median(uint64_t start_height, si
uint64_t blockchain_height = m_db->height(); uint64_t blockchain_height = m_db->height();
uint64_t tip_height = start_height + count - 1; uint64_t tip_height = start_height + count - 1;
crypto::hash tip_hash = crypto::null_hash; crypto::hash tip_hash = crypto::null_hash;
if (tip_height < blockchain_height && count == (size_t)m_long_term_block_weights_cache_rolling_median.size()) if (tip_height < blockchain_height)
{ {
tip_hash = m_db->get_block_hash_from_height(tip_height); tip_hash = m_db->get_block_hash_from_height(tip_height);
cached = tip_hash == m_long_term_block_weights_cache_tip_hash; if (count == (size_t)m_long_term_block_weights_cache_rolling_median.size())
{
cached = tip_hash == m_long_term_block_weights_cache_tip_hash;
}
} }
if (cached) if (cached)
@ -1500,8 +1503,11 @@ uint64_t Blockchain::get_long_term_block_weight_median(uint64_t start_height, si
// in the vast majority of uncached cases, most is still cached, // in the vast majority of uncached cases, most is still cached,
// as we just move the window one block up: // as we just move the window one block up:
if (tip_height > 0 && count == (size_t)m_long_term_block_weights_cache_rolling_median.size() && tip_height < blockchain_height) if (tip_height > 0 && tip_height < blockchain_height)
{ {
const size_t rmsize = m_long_term_block_weights_cache_rolling_median.size();
if (count == rmsize || (count == rmsize + 1 && rmsize < CRYPTONOTE_LONG_TERM_BLOCK_WEIGHT_WINDOW_SIZE))
{
crypto::hash old_tip_hash = m_db->get_block_hash_from_height(tip_height - 1); crypto::hash old_tip_hash = m_db->get_block_hash_from_height(tip_height - 1);
if (old_tip_hash == m_long_term_block_weights_cache_tip_hash) if (old_tip_hash == m_long_term_block_weights_cache_tip_hash)
{ {
@ -1510,6 +1516,7 @@ uint64_t Blockchain::get_long_term_block_weight_median(uint64_t start_height, si
m_long_term_block_weights_cache_rolling_median.insert(m_db->get_block_long_term_weight(tip_height)); m_long_term_block_weights_cache_rolling_median.insert(m_db->get_block_long_term_weight(tip_height));
return m_long_term_block_weights_cache_rolling_median.median(); return m_long_term_block_weights_cache_rolling_median.median();
} }
}
} }
MTRACE("requesting " << count << " from " << start_height << ", uncached"); MTRACE("requesting " << count << " from " << start_height << ", uncached");