diff options
Diffstat (limited to 'third_party/rust/crc32fast/benches/bench.rs')
-rw-r--r-- | third_party/rust/crc32fast/benches/bench.rs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/third_party/rust/crc32fast/benches/bench.rs b/third_party/rust/crc32fast/benches/bench.rs new file mode 100644 index 0000000000..53b3d838ea --- /dev/null +++ b/third_party/rust/crc32fast/benches/bench.rs @@ -0,0 +1,53 @@ +#[macro_use] +extern crate bencher; +extern crate crc32fast; +extern crate rand; + +use bencher::Bencher; +use crc32fast::Hasher; +use rand::Rng; + +fn bench(b: &mut Bencher, size: usize, hasher_init: Hasher) { + let mut bytes = vec![0u8; size]; + rand::thread_rng().fill(&mut bytes[..]); + + b.iter(|| { + let mut hasher = hasher_init.clone(); + hasher.update(&bytes); + bencher::black_box(hasher.finalize()) + }); + + b.bytes = size as u64; +} + +fn bench_kilobyte_baseline(b: &mut Bencher) { + bench(b, 1024, Hasher::internal_new_baseline(0, 0)) +} + +fn bench_kilobyte_specialized(b: &mut Bencher) { + bench(b, 1024, Hasher::internal_new_specialized(0, 0).unwrap()) +} + +fn bench_megabyte_baseline(b: &mut Bencher) { + bench(b, 1024 * 1024, Hasher::internal_new_baseline(0, 0)) +} + +fn bench_megabyte_specialized(b: &mut Bencher) { + bench( + b, + 1024 * 1024, + Hasher::internal_new_specialized(0, 0).unwrap(), + ) +} + +benchmark_group!( + bench_baseline, + bench_kilobyte_baseline, + bench_megabyte_baseline +); +benchmark_group!( + bench_specialized, + bench_kilobyte_specialized, + bench_megabyte_specialized +); +benchmark_main!(bench_baseline, bench_specialized); |