ddidderr/zstd-rs
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Reduce size of dctx by reutilizing dst buffer (#2751)

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* Reduce size of dctx by reutilizing dst buffer

Co-authored-by: Binh Vo <binhvo@fb.com>
This commit is contained in:
binhdvo
2021-10-25 10:38:01 -04:00
committed by GitHub
co-authored by Binh Vo
parent 0a794f5afe
commit 6a7ede3dfc
7 changed files with 666 additions and 106 deletions
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tests/fullbench.c
+3 -3
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@@ -123,11 +123,11 @@ static size_t local_ZSTD_decompress(const void* src, size_t srcSize,
static ZSTD_DCtx* g_zdc = NULL;
#ifndef ZSTD_DLL_IMPORT
extern size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
extern size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* ctx, const void* src, size_t srcSize, void* dst, size_t dstCapacity);
static size_t local_ZSTD_decodeLiteralsBlock(const void* src, size_t srcSize, void* dst, size_t dstSize, void* buff2)
{
(void)src; (void)srcSize; (void)dst; (void)dstSize;
return ZSTD_decodeLiteralsBlock(g_zdc, buff2, g_cSize);
return ZSTD_decodeLiteralsBlock(g_zdc, buff2, g_cSize, dst, dstSize);
}
static size_t local_ZSTD_decodeSeqHeaders(const void* src, size_t srcSize, void* dst, size_t dstSize, void* buff2)
@@ -577,7 +577,7 @@ static int benchMem(unsigned benchNb,
ip += ZSTD_blockHeaderSize; /* skip block header */
ZSTD_decompressBegin(g_zdc);
CONTROL(iend > ip);
ip += ZSTD_decodeLiteralsBlock(g_zdc, ip, (size_t)(iend-ip)); /* skip literal segment */
ip += ZSTD_decodeLiteralsBlock(g_zdc, ip, (size_t)(iend-ip), dstBuff, dstBuffSize); /* skip literal segment */
g_cSize = (size_t)(iend-ip);
memcpy(dstBuff2, ip, g_cSize); /* copy rest of block (it starts by SeqHeader) */
srcSize = srcSize > 128 KB ? 128 KB : srcSize; /* speed relative to block */