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Mempool Update Cut-Through Optimization

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Often when we're updating mempool entries we update entries that we
ultimately end up removing the updated entries shortly thereafter. This
patch makes it so that we filter for such entries a bit earlier in
processing, which yields a mild improvement for these cases, and is
negligible overhead otherwise.
This commit is contained in:
Jeremy Rubin
2021-03-17 14:11:44 -07:00
parent c49daf9885
commit c5b36b1c1b
3 changed files with 72 additions and 32 deletions
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4
src/validation.cpp
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@@ -348,7 +348,9 @@ void CChainState::MaybeUpdateMempoolForReorg(
// previously-confirmed transactions back to the mempool.
// UpdateTransactionsFromBlock finds descendants of any transactions in
// the disconnectpool that were added back and cleans up the mempool state.
m_mempool->UpdateTransactionsFromBlock(vHashUpdate);
const uint64_t ancestor_count_limit = gArgs.GetIntArg("-limitancestorcount", DEFAULT_ANCESTOR_LIMIT);
const uint64_t ancestor_size_limit = gArgs.GetIntArg("-limitancestorsize", DEFAULT_ANCESTOR_SIZE_LIMIT) * 1000;
m_mempool->UpdateTransactionsFromBlock(vHashUpdate, ancestor_size_limit, ancestor_count_limit);
const auto check_final_and_mature = [this, flags=STANDARD_LOCKTIME_VERIFY_FLAGS](CTxMemPool::txiter it)
EXCLUSIVE_LOCKS_REQUIRED(m_mempool->cs, ::cs_main) {