mirror of
https://github.com/ziglang/zig.git
synced 2026-02-12 04:17:49 +00:00
b4b90af4e0
Xoroshiro128+ is the current default non-cryptographic random number generator. This algorithm was designed to generate floating-point numbers, by only using the top 53 bits. Lower bits have a significant bias, that contradicts the documented properties for `rand.DefaultPrng`. This also has implications on everything using `Random.fill()`, including the way we generate random floating-point numbers. In addition, Xoroshiro128+ has known issues. See for example: - https://lemire.me/blog/2017/08/22/cracking-random-number-generators-xoroshiro128/ - https://www.pcg-random.org/posts/xoroshiro-fails-truncated.html Xoshiro256++ addresses these issues, while remaining very fast.