== Optimizing zlib for ARM ''by Adenilson Cavalcanti '' - People ship old libpng versions - libpng, zlib developed around same time - NEON simd - mandatory in ARMv8 - checksums easily optimized with simd instructions by checking sums of elements in blocks. - adler32, inffast, libpng w/ pallete improved - 10% - 10x faster - work being done to optimize zlib is easier than convincing everyone to upstream their work. - especially in projects like chromium, which have many copies of zlib - upstreaming optimizations to chromium caused armv6 project to try to use NEON, which broke it - security fixes in addition to optimizations exist in chromium's zlib