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level tuning

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This commit is contained in:
Yann Collet 2015-11-06 10:19:00 +01:00
parent f12c1304a8
commit 8ad12ec343
1 changed files with 23 additions and 27 deletions
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50
lib/zstdhc_static.h
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@ -98,38 +98,34 @@ size_t ZSTD_HC_compressEnd(ZSTD_HC_CCtx* ctx, void* dst, size_t maxDstSize);
/* *************************************
* Pre-defined compression levels
***************************************/
#define ZSTD_HC_MAX_CLEVEL 25
#define ZSTD_HC_MAX_CLEVEL 20
static const ZSTD_HC_parameters ZSTD_HC_defaultParameters[ZSTD_HC_MAX_CLEVEL+1] = {
/* W, C, H, S, L, strat */
{ 18, 12, 14, 1, 4, ZSTD_HC_fast }, /* level 0 - never used */
{ 18, 12, 14, 1, 7, ZSTD_HC_fast }, /* level 1 - in fact redirected towards zstd fast */
{ 18, 12, 15, 2, 4, ZSTD_HC_greedy }, /* level 2 */
{ 19, 14, 18, 2, 5, ZSTD_HC_greedy }, /* level 3 */
{ 20, 17, 19, 3, 5, ZSTD_HC_greedy }, /* level 4 */
{ 20, 18, 19, 2, 5, ZSTD_HC_lazy }, /* level 5 */
{ 21, 18, 20, 3, 5, ZSTD_HC_lazy }, /* level 6 */
{ 21, 19, 20, 3, 5, ZSTD_HC_lazy }, /* level 7 */
{ 21, 19, 20, 4, 5, ZSTD_HC_lazy }, /* level 8 */
{ 21, 19, 20, 5, 5, ZSTD_HC_lazy }, /* level 9 */
{ 21, 20, 20, 5, 5, ZSTD_HC_lazy }, /* level 10 */
{ 21, 20, 20, 5, 5, ZSTD_HC_lazy2 }, /* level 11 */
{ 22, 20, 22, 5, 5, ZSTD_HC_lazy2 }, /* level 12 */
{ 22, 20, 22, 6, 5, ZSTD_HC_lazy2 }, /* level 13 */
{ 22, 21, 22, 6, 5, ZSTD_HC_lazy2 }, /* level 14 */
{ 22, 21, 22, 6, 5, ZSTD_HC_lazy2 }, /* level 15 */
{ 22, 21, 22, 4, 5, ZSTD_HC_btlazy2 }, /* level 16 */
{ 23, 23, 23, 4, 5, ZSTD_HC_btlazy2 }, /* level 17 */
{ 23, 23, 23, 5, 5, ZSTD_HC_btlazy2 }, /* level 18 */
{ 25, 25, 23, 5, 5, ZSTD_HC_btlazy2 }, /* level 19 */
{ 25, 25, 23, 6, 5, ZSTD_HC_btlazy2 }, /* level 20 */
{ 25, 26, 23, 8, 5, ZSTD_HC_btlazy2 }, /* level 21 */
{ 25, 26, 23, 8, 5, ZSTD_HC_btlazy2 }, /* level 22 */
{ 25, 26, 23, 8, 5, ZSTD_HC_btlazy2 }, /* level 23 */
{ 25, 26, 23, 8, 5, ZSTD_HC_btlazy2 }, /* level 24 */
{ 25, 26, 23, 8, 5, ZSTD_HC_btlazy2 }, /* level 25 */
{ 18, 12, 12, 1, 4, ZSTD_HC_fast }, /* level 0 - never used */
{ 18, 14, 14, 1, 7, ZSTD_HC_fast }, /* level 1 - in fact redirected towards zstd fast */
{ 19, 15, 16, 1, 6, ZSTD_HC_fast }, /* level 2 */
{ 20, 18, 20, 1, 6, ZSTD_HC_fast }, /* level 3 */
{ 21, 19, 21, 1, 6, ZSTD_HC_fast }, /* level 4 */
{ 19, 14, 19, 2, 5, ZSTD_HC_greedy }, /* level 5 */
{ 20, 17, 19, 3, 5, ZSTD_HC_greedy }, /* level 6 */
{ 21, 17, 20, 3, 5, ZSTD_HC_lazy }, /* level 7 */
{ 21, 19, 20, 3, 5, ZSTD_HC_lazy }, /* level 8 */
{ 21, 19, 20, 4, 5, ZSTD_HC_lazy }, /* level 9 */
{ 21, 19, 20, 5, 5, ZSTD_HC_lazy }, /* level 10 */
{ 21, 20, 20, 5, 5, ZSTD_HC_lazy }, /* level 11 */
{ 22, 20, 22, 5, 5, ZSTD_HC_lazy2 }, /* level 12 */
{ 22, 21, 22, 5, 5, ZSTD_HC_lazy2 }, /* level 13 */
{ 22, 22, 23, 5, 5, ZSTD_HC_lazy2 }, /* level 14 */
{ 22, 21, 22, 6, 5, ZSTD_HC_lazy2 }, /* level 15 */
{ 22, 21, 22, 4, 5, ZSTD_HC_btlazy2 }, /* level 16 */
{ 23, 23, 23, 4, 5, ZSTD_HC_btlazy2 }, /* level 17 */
{ 25, 24, 23, 5, 5, ZSTD_HC_btlazy2 }, /* level 18 */
{ 25, 26, 23, 5, 5, ZSTD_HC_btlazy2 }, /* level 19 */
{ 26, 27, 24, 6, 5, ZSTD_HC_btlazy2 }, /* level 20 */
};
#if defined (__cplusplus)
}
#endif