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zlibWrapper: minor tweaks

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inikep
2016-09-26 22:47:39 +02:00
parent ad468ab25c
commit 60dddc2109
3 changed files with 4 additions and 4 deletions
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4
zlibWrapper/Makefile
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@ -32,7 +32,7 @@ test: example fitblk example_zstd fitblk_zstd zwrapbench
./fitblk_zstd 10240 <../zstd_compression_format.md
./fitblk_zstd 40960 <../zstd_compression_format.md
./zwrapbench -qb3B1K ../zstd_compression_format.md
./zwrapbench -qb1e5r ../lib ../programs ../tests
./zwrapbench -rqb1e5 ../lib ../programs ../tests
#valgrindTest: ZSTDLIBRARY = $(ZSTDLIBDIR)/libzstd.so
valgrindTest: VALGRIND = LD_LIBRARY_PATH=$(ZSTDLIBDIR) valgrind --track-origins=yes --leak-check=full --error-exitcode=1
@ -45,7 +45,7 @@ valgrindTest: clean example fitblk example_zstd fitblk_zstd zwrapbench
$(VALGRIND) ./fitblk_zstd 10240 <../zstd_compression_format.md
$(VALGRIND) ./fitblk_zstd 40960 <../zstd_compression_format.md
$(VALGRIND) ./zwrapbench -qb3B1K ../zstd_compression_format.md
$(VALGRIND) ./zwrapbench -qb1e5 ../lib ../programs ../tests
$(VALGRIND) ./zwrapbench -rqb1e5 ../lib ../programs ../tests
.c.o:
$(CC) $(CFLAGS) -c -o $@ $<

2
zlibWrapper/README.md
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@ -102,7 +102,7 @@ The speed of compression can be improved with reusing a single context with foll
- free the context with `deflateEnd`
To check the difference we made experiments using `zwrapbench -ri6b6` with zstd and zlib compression (both at level 6).
The input data was decompressed git repository downloaded from https://github.com/git/git/archive/master.zip that contains 2979 files.
The input data was decompressed git repository downloaded from https://github.com/git/git/archive/master.zip which contains 2979 files.
The table below shows that reusing contexts has a minor influence on zlib but it gives improvement for zstd.
In our example (the last 2 lines) it gives 4% better compression speed and 5% better decompression speed.

2
zlibWrapper/zstd_zlibwrapper.c
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@ -260,7 +260,7 @@ ZEXTERN int ZEXPORT z_deflate OF((z_streamp strm, int flush))
if (zwc->zbc == NULL) {
int res;
zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem);
if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, res);
if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0);
res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : 0);
if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res);
} else {