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Allow Different Dict Attachment Cut-Offs for Different Strategies

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This commit is contained in:
W. Felix Handte 2018-05-25 15:19:37 -04:00
parent f86796639e
commit 48deab92de
1 changed files with 12 additions and 1 deletions
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13
lib/compress/zstd_compress.c
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@ -1207,7 +1207,18 @@ static size_t ZSTD_resetCCtx_usingCDict(ZSTD_CCtx* cctx,
/* We have a choice between copying the dictionary context into the working
* context, or referencing the dictionary context from the working context
* in-place. We decide here which strategy to use. */
const int attachDict = ( pledgedSrcSize <= 8 KB
const U64 attachDictSizeCutoffs[(unsigned)ZSTD_btultra+1] = {
8 KB, /* unused */
8 KB, /* ZSTD_fast */
16 KB, /* ZSTD_dfast */
16 KB, /* ZSTD_greedy */
16 KB, /* ZSTD_lazy */
16 KB, /* ZSTD_lazy2 */
16 KB, /* ZSTD_btlazy2 */
16 KB, /* ZSTD_btopt */
16 KB /* ZSTD_btultra */
};
const int attachDict = ( pledgedSrcSize <= attachDictSizeCutoffs[cdict->cParams.strategy]
|| pledgedSrcSize == ZSTD_CONTENTSIZE_UNKNOWN )
&& !params.forceWindow /* dictMatchState isn't correctly
* handled in _enforceMaxDist */