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optimize ZSTDMT_compress() memory usage

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does no longer allocate temporary buffers
when there is enough room in dstBuffer to decompress directly there.
(previous method would skip that for 1st chunk only).

Also : fix ZSTD_compressBound() for small srcSize
This commit is contained in:
Yann Collet
2017-03-31 18:27:03 -07:00
parent 3f75d52527
commit 30c7698970
3 changed files with 17 additions and 10 deletions
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5
tests/zstreamtest.c
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@ -856,6 +856,7 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
/* some issues can only happen when reusing states */
if ((FUZ_rand(&lseed) & 0xFF) == 131) {
U32 const nbThreads = (FUZ_rand(&lseed) % 6) + 1;
DISPLAYLEVEL(5, "Creating new context with %u threads \n", nbThreads);
ZSTDMT_freeCCtx(zc);
zc = ZSTDMT_createCCtx(nbThreads);
resetAllowed=0;
@ -946,7 +947,7 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
outBuff.size = outBuff.pos + adjustedDstSize;
DISPLAYLEVEL(5, "Flushing into dst buffer of size %u \n", (U32)adjustedDstSize);
{ size_t const flushError = ZSTDMT_flushStream(zc, &outBuff);
CHECK (ZSTD_isError(flushError), "flush error : %s", ZSTD_getErrorName(flushError));
CHECK (ZSTD_isError(flushError), "ZSTDMT_flushStream error : %s", ZSTD_getErrorName(flushError));
} } }
/* final frame epilogue */
@ -957,7 +958,7 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
outBuff.size = outBuff.pos + adjustedDstSize;
DISPLAYLEVEL(5, "Ending into dst buffer of size %u \n", (U32)adjustedDstSize);
remainingToFlush = ZSTDMT_endStream(zc, &outBuff);
CHECK (ZSTD_isError(remainingToFlush), "flush error : %s", ZSTD_getErrorName(remainingToFlush));
CHECK (ZSTD_isError(remainingToFlush), "ZSTDMT_endStream error : %s", ZSTD_getErrorName(remainingToFlush));
DISPLAYLEVEL(5, "endStream : remainingToFlush : %u \n", (U32)remainingToFlush);
} }
DISPLAYLEVEL(5, "Frame completed \n");