Do not enable checksums for zlib compression.
Summary: Leveldb code already calculates checksums for each block. There is no need to generate checksums inside zlib. This patch switches-off checksum generation/checking in zlib library. (The Inno support for zlib uses windowsBits=14 as well.) pfabricator marks this file as binary. But here is the diff diff --git a/port/port_posix.h b/port/port_posix.h index 86a0927..db4e0b8 100644 --- a/port/port_posix.h +++ b/port/port_posix.h @@ -163,7 +163,7 @@ inline bool Snappy_Uncompress(const char* input, size_t length, } inline bool Zlib_Compress(const char* input, size_t length, - ::std::string* output, int windowBits = 15, int level = -1, + ::std::string* output, int windowBits = -14, int level = -1, int strategy = 0) { #ifdef ZLIB // The memLevel parameter specifies how much memory should be allocated for @@ -223,7 +223,7 @@ inline bool Zlib_Compress(const char* input, size_t length, } inline char* Zlib_Uncompress(const char* input_data, size_t input_length, - int* decompress_size, int windowBits = 15) { + int* decompress_size, int windowBits = -14) { #ifdef ZLIB z_stream _stream; memset(&_stream, 0, sizeof(z_stream)); Test Plan: run db_bench with zlib compression. Reviewers: heyongqiang, MarkCallaghan Reviewed By: heyongqiang Differential Revision: https://reviews.facebook.net/D6105
Showing
想要评论请 注册 或 登录