Added "astrobwt-avx2" parameter in config.json, it's turned off ("false") by default.
4-5% speedup on CPUs with proper AVX2 support (AMD Ryzen starting with Zen2, Intel Core starting with Haswell).
There will be no speedup on the following CPUs:
- Intel Pentium/Celeron don't support AVX2
- AMD Zen/Zen+ have only half-speed AVX
GCC compiled version is faster without AVX2, MSVC compiled version is faster with AVX2
Skips hashes with large stage 2 size. Added configurable `astrobwt-max-size` parameter, default value is 550, min 400, max 1200, optimal value ranges from 500 to 600 depending on CPU.
- Intel CPUs get 20-25% speedup
- 1st- and 2nd-gen Ryzens get 30% speedup
- 3rd-gen Ryzens get up to 50% speedup
