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Add a ZSTD_dedicatedDictSearch ZSTD_dictMode_e to Allow Const Propagation

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Speed +1.5%.
This commit is contained in:
W. Felix Handte
2020-09-10 18:51:52 -04:00
parent beefdb0d3d
commit 34b545acb0
4 changed files with 85 additions and 20 deletions
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lib/compress/zstd_compress.c
+12 -2
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@@ -2212,7 +2212,7 @@ ZSTD_compressSequences(seqStore_t* seqStorePtr,
* assumption : strat is a valid strategy */
ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_dictMode_e dictMode)
{
static const ZSTD_blockCompressor blockCompressor[3][ZSTD_STRATEGY_MAX+1] = {
static const ZSTD_blockCompressor blockCompressor[4][ZSTD_STRATEGY_MAX+1] = {
{ ZSTD_compressBlock_fast /* default for 0 */,
ZSTD_compressBlock_fast,
ZSTD_compressBlock_doubleFast,
@@ -2242,7 +2242,17 @@ ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_dictMo
ZSTD_compressBlock_btlazy2_dictMatchState,
ZSTD_compressBlock_btopt_dictMatchState,
ZSTD_compressBlock_btultra_dictMatchState,
ZSTD_compressBlock_btultra_dictMatchState }
ZSTD_compressBlock_btultra_dictMatchState },
{ NULL /* default for 0 */,
NULL,
NULL,
ZSTD_compressBlock_greedy_dedicatedDictSearch,
ZSTD_compressBlock_lazy_dedicatedDictSearch,
ZSTD_compressBlock_lazy2_dedicatedDictSearch,
NULL,
NULL,
NULL,
NULL }
};
ZSTD_blockCompressor selectedCompressor;
ZSTD_STATIC_ASSERT((unsigned)ZSTD_fast == 1);