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statistics of encoded sequences

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This commit is contained in:
inikep
2016-02-23 12:41:56 +01:00
parent 9f754d23dc
commit 15174b0cfb
4 changed files with 27 additions and 4 deletions
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lib/zstd_compress.c
+14
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@@ -726,6 +726,12 @@ MEM_STATIC void ZSTD_storeSeq(seqStore_t* seqStorePtr, size_t litLength, const B
printf("pos %6u : %3u literals & match %3u bytes at distance %6u \n",
(U32)(literals - g_start), (U32)litLength, (U32)matchCode+MINMATCH, (U32)offsetCode);
#endif
#if ZSTD_OPT_DEBUG >= 3
if (offsetCode == 0) seqStorePtr->realRepSum++;
seqStorePtr->realSeqSum++;
seqStorePtr->realMatchSum += matchCode;
seqStorePtr->realLitSum += litLength;
#endif
/* copy Literals */
ZSTD_wildcopy(seqStorePtr->lit, literals, litLength);
@@ -1912,6 +1918,9 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
BYTE* const ostart = (BYTE*)dst;
BYTE* op = ostart;
const U32 maxDist = 1 << zc->params.windowLog;
seqStore_t* ssPtr = &zc->seqStore;
ssPtr->realMatchSum = ssPtr->realLitSum = ssPtr->realSeqSum = ssPtr->realRepSum = 0;
while (remaining) {
size_t cSize;
@@ -1945,6 +1954,11 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
op += cSize;
}
#if ZSTD_OPT_DEBUG >= 3
ssPtr->realMatchSum += ssPtr->realSeqSum * ((zc->params.searchLength == 3) ? 3 : 4);
printf("avgMatchL=%.2f avgLitL=%.2f match=%.1f%% lit=%.1f%% reps=%d seq=%d\n", (float)ssPtr->realMatchSum/ssPtr->realSeqSum, (float)ssPtr->realLitSum/ssPtr->realSeqSum, 100.0*ssPtr->realMatchSum/(ssPtr->realMatchSum+ssPtr->realLitSum), 100.0*ssPtr->realLitSum/(ssPtr->realMatchSum+ssPtr->realLitSum), ssPtr->realRepSum, ssPtr->realSeqSum);
#endif
return op-ostart;
}