highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2026-01-21 07:39:08 +01:00
Code Issues Packages Projects Releases Wiki Activity

optimization: migrate SipHashUint256 to PresaltedSipHasher

Browse Source 
Replaces standalone `SipHashUint256` with an `operator()` overload in `PresaltedSipHasher`.
Updates all hasher classes (`SaltedUint256Hasher`, `SaltedTxidHasher`, `SaltedWtxidHasher`) to use `PresaltedSipHasher` internally, enabling the same constant-state caching optimization while keeping behavior unchanged.

Benchmark was also adjusted to cache the salting part.
This commit is contained in:
Lőrinc
2025-09-30 20:58:19 -04:00
parent ec11b9fede
commit 9ca52a4cbe
8 changed files with 45 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/util/hasher.cpp
View File

@@ -7,17 +7,20 @@
#include <span.h>
#include <util/hasher.h>
SaltedUint256Hasher::SaltedUint256Hasher() :
k0{FastRandomContext().rand64()},
k1{FastRandomContext().rand64()} {}
SaltedUint256Hasher::SaltedUint256Hasher() : m_hasher{
FastRandomContext().rand64(),
FastRandomContext().rand64()}
{}
SaltedTxidHasher::SaltedTxidHasher() :
k0{FastRandomContext().rand64()},
k1{FastRandomContext().rand64()} {}
SaltedTxidHasher::SaltedTxidHasher() : m_hasher{
FastRandomContext().rand64(),
FastRandomContext().rand64()}
{}
SaltedWtxidHasher::SaltedWtxidHasher() :
k0{FastRandomContext().rand64()},
k1{FastRandomContext().rand64()} {}
SaltedWtxidHasher::SaltedWtxidHasher() : m_hasher{
FastRandomContext().rand64(),
FastRandomContext().rand64()}
{}
SaltedOutpointHasher::SaltedOutpointHasher(bool deterministic) : m_hasher{
deterministic ? 0x8e819f2607a18de6 : FastRandomContext().rand64(),