Many repackers daily use ZPAQ compressor?? Few weeks ago released the specially modified ZPAQF release, added/modded in 1,4,8 bit images compression optimizations. Speedup are ~40% faster and ratio gains ~1-6% than orig ZPAQ 7.15 version.
See this:
https://encode.su/threads/4369-Under...ng-zpaq-models
or directly the src:
https://github.com/kaitz/zpaqf
One problems: Not available compiled binaries.
UPD: kaitz released in previous days new
zpaq7.15.2f version and x64 compiled binaries. The EXE file instant crashing. I need AVX/AVX2 capable CPU??