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#![feature(test)]
extern crate test;
use rand::prelude::*;
use test::Bencher;
use wyhash::WyRng;
#[bench]
fn shuffle_wyhash(b: &mut Bencher) {
let mut rng = WyRng::from_rng(thread_rng()).unwrap();
let mut x = (0..100).collect::<Vec<usize>>();
b.iter(|| {
x.shuffle(&mut rng);
x[0]
})
}
#[bench]
fn shuffle_fastrand(b: &mut Bencher) {
let mut rng = fastrand::Rng::new();
let mut x = (0..100).collect::<Vec<usize>>();
b.iter(|| {
rng.shuffle(&mut x);
x[0]
})
}
#[bench]
fn u8_wyhash(b: &mut Bencher) {
let mut rng = WyRng::from_rng(thread_rng()).unwrap();
b.iter(|| {
let mut sum = 0u8;
for _ in 0..10_000 {
sum = sum.wrapping_add(rng.gen::<u8>());
}
sum
})
}
#[bench]
fn u8_fastrand(b: &mut Bencher) {
let mut rng = fastrand::Rng::new();
b.iter(|| {
let mut sum = 0u8;
for _ in 0..10_000 {
sum = sum.wrapping_add(rng.u8(..));
}
sum
})
}
#[bench]
fn u32_wyhash(b: &mut Bencher) {
let mut rng = WyRng::from_rng(thread_rng()).unwrap();
b.iter(|| {
let mut sum = 0u32;
for _ in 0..10_000 {
sum = sum.wrapping_add(rng.gen::<u32>());
}
sum
})
}
#[bench]
fn u32_fastrand(b: &mut Bencher) {
let mut rng = fastrand::Rng::new();
b.iter(|| {
let mut sum = 0u32;
for _ in 0..10_000 {
sum = sum.wrapping_add(rng.u32(..));
}
sum
})
}
#[bench]
fn fill(b: &mut Bencher) {
let mut rng = fastrand::Rng::new();
b.iter(|| {
// Pick a size that isn't divisible by 8.
let mut bytes = [0u8; 367];
rng.fill(&mut bytes);
bytes
})
}
#[bench]
fn fill_naive(b: &mut Bencher) {
let mut rng = fastrand::Rng::new();
b.iter(|| {
let mut bytes = [0u8; 367];
for item in &mut bytes {
*item = rng.u8(..);
}
bytes
})
}