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prng-bench

Benchmarking different methods to generate 1GB of random bytes in Rust.

On an AMD Ryzen 9 6900HX

PRNG	method	ns / byte
rand	collect `u8`	2.36
rand	`fill_bytes`	0.26
SmallRng	`fill_bytes`	0.09
Xoshiro256**	`fill_bytes`	0.09
Xoshiro256++	`fill_bytes`	0.09
Xoshiro512**	`fill_bytes`	0.10
Xoshiro512++	`fill_bytes`	0.11
nanorand	`fill_bytes`	0.30
fastrand	`fill`	0.09

On an Apple M1

PRNG	method	ns / byte
rand	collect `u8`	6.63
rand	`fill_bytes`	1.11
SmallRng	`fill_bytes`	0.17
Xoshiro256**	`fill_bytes`	0.16
Xoshiro256++	`fill_bytes`	0.14
Xoshiro512**	`fill_bytes`	0.17
Xoshiro512++	`fill_bytes`	0.15
nanorand	`fill_bytes`	0.27
fastrand	`fill`	0.04

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A simple benchmark of multiple PRNGs in Rust

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