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[dictBuilder] Set default compression level to 3

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This commit is contained in:
Nick Terrell 2017-08-24 14:45:06 -07:00
parent e9ce1208a1
commit 376f435914
1 changed files with 4 additions and 2 deletions
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6
lib/dictBuilder/zdict.c
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@ -60,7 +60,7 @@
#define NOISELENGTH 32 #define NOISELENGTH 32
static const int g_compressionLevel_default = 6; static const int g_compressionLevel_default = 3;
static const U32 g_selectivity_default = 9; static const U32 g_selectivity_default = 9;
@ -703,7 +703,7 @@ static size_t ZDICT_analyzeEntropy(void* dstBuffer, size_t maxDstSize,
memset(repOffset, 0, sizeof(repOffset)); memset(repOffset, 0, sizeof(repOffset));
repOffset[1] = repOffset[4] = repOffset[8] = 1; repOffset[1] = repOffset[4] = repOffset[8] = 1;
memset(bestRepOffset, 0, sizeof(bestRepOffset)); memset(bestRepOffset, 0, sizeof(bestRepOffset));
if (compressionLevel==0) compressionLevel = g_compressionLevel_default; if (compressionLevel<=0) compressionLevel = g_compressionLevel_default;
params = ZSTD_getParams(compressionLevel, averageSampleSize, dictBufferSize); params = ZSTD_getParams(compressionLevel, averageSampleSize, dictBufferSize);
{ size_t const beginResult = ZSTD_compressBegin_advanced(esr.ref, dictBuffer, dictBufferSize, params, 0); { size_t const beginResult = ZSTD_compressBegin_advanced(esr.ref, dictBuffer, dictBufferSize, params, 0);
if (ZSTD_isError(beginResult)) { if (ZSTD_isError(beginResult)) {
@ -1056,6 +1056,8 @@ size_t ZDICT_trainFromBuffer(void* dictBuffer, size_t dictBufferCapacity,
memset(&params, 0, sizeof(params)); memset(&params, 0, sizeof(params));
params.d = 8; params.d = 8;
params.steps = 4; params.steps = 4;
/* Default to level 6 since no compression level information is avaialble */
params.zParams.compressionLevel = 6;
return ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, dictBufferCapacity, return ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, dictBufferCapacity,
samplesBuffer, samplesSizes, samplesBuffer, samplesSizes,
nbSamples, &params); nbSamples, &params);