lighthouse/eth2/utils/swap_or_not_shuffle/benches/benches.rs
gnattishness a488c4dccd Rename get_permutated_index to compute_shuffled_index. (#564)
To match name of equivalent function in v0.8.3 spec.
2019-10-29 12:07:12 +11:00

93 lines
2.7 KiB
Rust

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