Show HN: LoopMix128 – Fast C PRNG (.46ns), 2^128 Period, BigCrush/PractRand Pass
LoopMix128 is a fast C PRNG I wrote for non-cryptographic tasks.GitHub (MIT): https://github.com/danielcota/LoopMix128Highlights:* ~0.37 ns/value (GCC 11.4, -O3 -march=native), 98% faster than xoroshiro128++ and PCG64.* Passes TestU01 BigCrush & PractRand (32TB).* Guaranteed 2^128 period.* Proven injective (192-bit state) via Z3 SMT solver; allows parallel streams.* Core requires only stdint.h.Seeking feedback on design, use cases, or further testing. Comments URL: https://news.ycombinator.com/item?id=43949134 Points: 24 # Comments: 14
LoopMix128 is a fast C PRNG I wrote for non-cryptographic tasks.
GitHub (MIT): https://github.com/danielcota/LoopMix128
Highlights:
* ~0.37 ns/value (GCC 11.4, -O3 -march=native), 98% faster than xoroshiro128++ and PCG64.
* Passes TestU01 BigCrush & PractRand (32TB).
* Guaranteed 2^128 period.
* Proven injective (192-bit state) via Z3 SMT solver; allows parallel streams.
* Core requires only stdint.h.
Seeking feedback on design, use cases, or further testing.
Comments URL: https://news.ycombinator.com/item?id=43949134
Points: 24
# Comments: 14
