39 lines
1.0 KiB
Rust
39 lines
1.0 KiB
Rust
#![feature(test)]
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extern crate test;
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use {
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rand::{Rng, SeedableRng},
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rand_chacha::ChaChaRng,
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solana_gossip::weighted_shuffle::WeightedShuffle,
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std::iter::repeat_with,
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test::Bencher,
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};
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fn make_weights<R: Rng>(rng: &mut R) -> Vec<u64> {
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repeat_with(|| rng.gen_range(1..100)).take(4000).collect()
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}
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#[bench]
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fn bench_weighted_shuffle_new(bencher: &mut Bencher) {
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let mut rng = rand::thread_rng();
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bencher.iter(|| {
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let weights = make_weights(&mut rng);
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std::hint::black_box(WeightedShuffle::new("", &weights));
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});
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}
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#[bench]
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fn bench_weighted_shuffle_shuffle(bencher: &mut Bencher) {
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let mut seed = [0u8; 32];
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let mut rng = rand::thread_rng();
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let weights = make_weights(&mut rng);
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let weighted_shuffle = WeightedShuffle::new("", &weights);
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bencher.iter(|| {
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rng.fill(&mut seed[..]);
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let mut rng = ChaChaRng::from_seed(seed);
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let shuffle = weighted_shuffle.clone().shuffle(&mut rng);
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std::hint::black_box(shuffle.collect::<Vec<_>>());
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});
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}
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