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Use incremental updates more often

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Use incremental updates for accumulators for up to 2 plies.
Do not copy accumulator. About 2% speedup.

Passed STC:
LLR: 2.95 (-2.94,2.94) {-0.25,1.25}
Total: 21752 W: 2583 L: 2403 D: 16766
Ptnml(0-2): 128, 1761, 6923, 1931, 133
https://tests.stockfishchess.org/tests/view/5f7150cf3b22d6afa5069412

closes https://github.com/official-stockfish/Stockfish/pull/3157

No functional change
This commit is contained in:
noobpwnftw
2020-09-28 02:29:21 +08:00
committed by Joost VandeVondele
parent 1dbd2a1ad5
commit c065abdcaf
4 changed files with 87 additions and 30 deletions
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src/nnue/features/half_kp.h
+1 -1
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@@ -50,7 +50,7 @@ namespace Eval::NNUE::Features {
IndexList* active);
// Get a list of indices for recently changed features
static void AppendChangedIndices(const Position& pos, Color perspective,
static void AppendChangedIndices(const Position& pos, const DirtyPiece& dp, Color perspective,
IndexList* removed, IndexList* added);
private: