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Various performance tweaks to CCoinsView

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* Pass txid's to CCoinsView functions by reference instead of by value
* Add a method to swap CCoins, and use it in some places to avoid a
  allocating copy + destruct.
* Optimize CCoinsViewCache::FetchCoins to do only a single search
  through the backing map.
This commit is contained in:
Pieter Wuille
2013-01-20 18:05:34 +01:00
parent 71eccdeaff
commit f369d02c51
4 changed files with 47 additions and 37 deletions
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6
src/txdb.cpp
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@@ -22,17 +22,17 @@ void static BatchWriteHashBestChain(CLevelDBBatch &batch, const uint256 &hash) {
CCoinsViewDB::CCoinsViewDB(size_t nCacheSize, bool fMemory, bool fWipe) : db(GetDataDir() / "coins", nCacheSize, fMemory, fWipe) {
}
bool CCoinsViewDB::GetCoins(uint256 txid, CCoins &coins) {
bool CCoinsViewDB::GetCoins(const uint256 &txid, CCoins &coins) {
return db.Read(make_pair('c', txid), coins);
}
bool CCoinsViewDB::SetCoins(uint256 txid, const CCoins &coins) {
bool CCoinsViewDB::SetCoins(const uint256 &txid, const CCoins &coins) {
CLevelDBBatch batch;
BatchWriteCoins(batch, txid, coins);
return db.WriteBatch(batch);
}
bool CCoinsViewDB::HaveCoins(uint256 txid) {
bool CCoinsViewDB::HaveCoins(const uint256 &txid) {
return db.Exists(make_pair('c', txid));
}