Drop in replacement for zlib 1.2.11 with optimizations from various sources.
This fork is based on the official zlib repository: https://github.com/madler/zlib
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Optimizations from Intel without the new deflate strategies (quick, medium)
crc32: crc32 implementation with PCLMULQDQ optimized folding
deflate: slide_hash_sse in fill_window
deflate: use crc32 (SIMD) to calculate hash
https://github.com/jtkukunas/zlib -
Optimizations from Cloudflare
deflate: longest_match optimizations (https://github.com/cloudflare/zlib/commit/31043308c3d3edfb487d2c4cbe7290bd5b63c65c)
https://github.com/cloudflare/zlib -
Optimized longest_match
https://github.com/gildor2/fast_zlib
Adapted function to use crc32 (SIMD) to calculate hash and integrated match compare optimization from above -
Other small changes
put_short optimization (https://github.com/Dead2/zlib-ng/commit/666581bbc17eaea62acb47cf47ab35a037e9b9d0)
https://github.com/Dead2/zlib-ng -
Optimizations for ARM
adler32: Adenilson Cavalcanti <adenilson.cavalcanti@arm.com>
fill_window: Mika T. Lindqvist <postmaster@raasu.org> -
adler32-simd from Chromium
https://github.com/chromium/chromium/blob/master/third_party/zlib/adler32_simd.c
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Support and optimizations for MSVC15 compiler
Support for _M_ARM64
Use __forceinline -
Use tzcnt instead of bsf
This improves performance for AMD CPUs -
Implementation optimized for modern CPUs (Intel Nehalem)
Removed alignment loop in crc32
Adds temporary in crc32_little calcuation
Less manual unrolling -
Others
Optimized insert_string loop
The performance results and pre-built binaries can be found here: https://github.com/matbech/zlib-perf