93 lines
2.7 KiB
Rust
93 lines
2.7 KiB
Rust
use criterion::Criterion;
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use criterion::{black_box, criterion_group, criterion_main, Benchmark};
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use swap_or_not_shuffle::{compute_shuffled_index, shuffle_list as fast_shuffle};
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const SHUFFLE_ROUND_COUNT: u8 = 90;
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fn shuffle_list(seed: &[u8], list_size: usize) -> Vec<usize> {
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let mut output = Vec::with_capacity(list_size);
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for i in 0..list_size {
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output.push(compute_shuffled_index(i, list_size, seed, SHUFFLE_ROUND_COUNT).unwrap());
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}
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output
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}
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fn shuffles(c: &mut Criterion) {
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c.bench_function("single swap", move |b| {
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let seed = vec![42; 32];
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b.iter(|| black_box(compute_shuffled_index(0, 10, &seed, SHUFFLE_ROUND_COUNT)))
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});
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c.bench_function("whole list of size 8", move |b| {
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let seed = vec![42; 32];
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b.iter(|| black_box(shuffle_list(&seed, 8)))
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});
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c.bench(
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"whole list shuffle",
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Benchmark::new("8 elements", move |b| {
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let seed = vec![42; 32];
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b.iter(|| black_box(shuffle_list(&seed, 8)))
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}),
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);
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c.bench(
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"whole list shuffle",
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Benchmark::new("16 elements", move |b| {
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let seed = vec![42; 32];
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b.iter(|| black_box(shuffle_list(&seed, 16)))
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}),
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);
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c.bench(
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"whole list shuffle",
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Benchmark::new("512 elements", move |b| {
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let seed = vec![42; 32];
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b.iter(|| black_box(shuffle_list(&seed, 512)))
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})
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.sample_size(10),
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);
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c.bench(
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"_fast_ whole list shuffle",
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Benchmark::new("512 elements", move |b| {
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let seed = vec![42; 32];
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let list: Vec<usize> = (0..512).collect();
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b.iter(|| black_box(fast_shuffle(list.clone(), SHUFFLE_ROUND_COUNT, &seed, true)))
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})
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.sample_size(10),
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);
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c.bench(
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"whole list shuffle",
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Benchmark::new("16384 elements", move |b| {
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let seed = vec![42; 32];
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b.iter(|| black_box(shuffle_list(&seed, 16_384)))
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})
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.sample_size(10),
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);
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c.bench(
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"_fast_ whole list shuffle",
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Benchmark::new("16384 elements", move |b| {
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let seed = vec![42; 32];
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let list: Vec<usize> = (0..16384).collect();
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b.iter(|| black_box(fast_shuffle(list.clone(), SHUFFLE_ROUND_COUNT, &seed, true)))
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})
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.sample_size(10),
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);
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c.bench(
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"_fast_ whole list shuffle",
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Benchmark::new("4m elements", move |b| {
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let seed = vec![42; 32];
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let list: Vec<usize> = (0..4_000_000).collect();
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b.iter(|| black_box(fast_shuffle(list.clone(), SHUFFLE_ROUND_COUNT, &seed, true)))
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})
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.sample_size(10),
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);
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}
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criterion_group!(benches, shuffles,);
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criterion_main!(benches);
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