mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-28 01:34:21 +00:00
578 lines
13 KiB
Rust
578 lines
13 KiB
Rust
use std::iter::{repeat, FromIterator};
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use test::{black_box, Bencher};
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#[bench]
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fn bench_new(b: &mut Bencher) {
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b.iter(|| {
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let v: Vec<u32> = Vec::new();
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assert_eq!(v.len(), 0);
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assert_eq!(v.capacity(), 0);
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})
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}
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fn do_bench_with_capacity(b: &mut Bencher, src_len: usize) {
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b.bytes = src_len as u64;
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b.iter(|| {
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let v: Vec<u32> = Vec::with_capacity(src_len);
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assert_eq!(v.len(), 0);
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assert_eq!(v.capacity(), src_len);
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})
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}
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#[bench]
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fn bench_with_capacity_0000(b: &mut Bencher) {
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do_bench_with_capacity(b, 0)
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}
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#[bench]
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fn bench_with_capacity_0010(b: &mut Bencher) {
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do_bench_with_capacity(b, 10)
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}
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#[bench]
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fn bench_with_capacity_0100(b: &mut Bencher) {
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do_bench_with_capacity(b, 100)
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}
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#[bench]
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fn bench_with_capacity_1000(b: &mut Bencher) {
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do_bench_with_capacity(b, 1000)
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}
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fn do_bench_from_fn(b: &mut Bencher, src_len: usize) {
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b.bytes = src_len as u64;
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b.iter(|| {
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let dst = (0..src_len).collect::<Vec<_>>();
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assert_eq!(dst.len(), src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
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})
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}
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#[bench]
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fn bench_from_fn_0000(b: &mut Bencher) {
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do_bench_from_fn(b, 0)
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}
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#[bench]
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fn bench_from_fn_0010(b: &mut Bencher) {
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do_bench_from_fn(b, 10)
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}
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#[bench]
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fn bench_from_fn_0100(b: &mut Bencher) {
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do_bench_from_fn(b, 100)
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}
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#[bench]
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fn bench_from_fn_1000(b: &mut Bencher) {
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do_bench_from_fn(b, 1000)
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}
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fn do_bench_from_elem(b: &mut Bencher, src_len: usize) {
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b.bytes = src_len as u64;
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b.iter(|| {
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let dst: Vec<usize> = repeat(5).take(src_len).collect();
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assert_eq!(dst.len(), src_len);
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assert!(dst.iter().all(|x| *x == 5));
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})
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}
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#[bench]
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fn bench_from_elem_0000(b: &mut Bencher) {
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do_bench_from_elem(b, 0)
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}
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#[bench]
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fn bench_from_elem_0010(b: &mut Bencher) {
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do_bench_from_elem(b, 10)
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}
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#[bench]
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fn bench_from_elem_0100(b: &mut Bencher) {
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do_bench_from_elem(b, 100)
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}
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#[bench]
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fn bench_from_elem_1000(b: &mut Bencher) {
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do_bench_from_elem(b, 1000)
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}
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fn do_bench_from_slice(b: &mut Bencher, src_len: usize) {
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let src: Vec<_> = FromIterator::from_iter(0..src_len);
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b.bytes = src_len as u64;
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b.iter(|| {
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let dst = src.clone()[..].to_vec();
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assert_eq!(dst.len(), src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
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});
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}
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#[bench]
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fn bench_from_slice_0000(b: &mut Bencher) {
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do_bench_from_slice(b, 0)
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}
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#[bench]
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fn bench_from_slice_0010(b: &mut Bencher) {
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do_bench_from_slice(b, 10)
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}
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#[bench]
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fn bench_from_slice_0100(b: &mut Bencher) {
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do_bench_from_slice(b, 100)
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}
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#[bench]
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fn bench_from_slice_1000(b: &mut Bencher) {
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do_bench_from_slice(b, 1000)
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}
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fn do_bench_from_iter(b: &mut Bencher, src_len: usize) {
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let src: Vec<_> = FromIterator::from_iter(0..src_len);
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b.bytes = src_len as u64;
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b.iter(|| {
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let dst: Vec<_> = FromIterator::from_iter(src.clone());
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assert_eq!(dst.len(), src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
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});
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}
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#[bench]
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fn bench_from_iter_0000(b: &mut Bencher) {
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do_bench_from_iter(b, 0)
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}
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#[bench]
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fn bench_from_iter_0010(b: &mut Bencher) {
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do_bench_from_iter(b, 10)
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}
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#[bench]
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fn bench_from_iter_0100(b: &mut Bencher) {
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do_bench_from_iter(b, 100)
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}
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#[bench]
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fn bench_from_iter_1000(b: &mut Bencher) {
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do_bench_from_iter(b, 1000)
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}
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fn do_bench_extend(b: &mut Bencher, dst_len: usize, src_len: usize) {
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let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
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let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
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b.bytes = src_len as u64;
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b.iter(|| {
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let mut dst = dst.clone();
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dst.extend(src.clone());
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assert_eq!(dst.len(), dst_len + src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
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});
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}
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#[bench]
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fn bench_extend_0000_0000(b: &mut Bencher) {
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do_bench_extend(b, 0, 0)
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}
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#[bench]
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fn bench_extend_0000_0010(b: &mut Bencher) {
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do_bench_extend(b, 0, 10)
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}
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#[bench]
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fn bench_extend_0000_0100(b: &mut Bencher) {
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do_bench_extend(b, 0, 100)
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}
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#[bench]
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fn bench_extend_0000_1000(b: &mut Bencher) {
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do_bench_extend(b, 0, 1000)
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}
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#[bench]
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fn bench_extend_0010_0010(b: &mut Bencher) {
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do_bench_extend(b, 10, 10)
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}
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#[bench]
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fn bench_extend_0100_0100(b: &mut Bencher) {
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do_bench_extend(b, 100, 100)
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}
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#[bench]
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fn bench_extend_1000_1000(b: &mut Bencher) {
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do_bench_extend(b, 1000, 1000)
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}
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fn do_bench_extend_from_slice(b: &mut Bencher, dst_len: usize, src_len: usize) {
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let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
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let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
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b.bytes = src_len as u64;
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b.iter(|| {
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let mut dst = dst.clone();
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dst.extend_from_slice(&src);
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assert_eq!(dst.len(), dst_len + src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
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});
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}
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#[bench]
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fn bench_extend_from_slice_0000_0000(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 0, 0)
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}
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#[bench]
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fn bench_extend_from_slice_0000_0010(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 0, 10)
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}
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#[bench]
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fn bench_extend_from_slice_0000_0100(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 0, 100)
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}
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#[bench]
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fn bench_extend_from_slice_0000_1000(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 0, 1000)
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}
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#[bench]
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fn bench_extend_from_slice_0010_0010(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 10, 10)
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}
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#[bench]
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fn bench_extend_from_slice_0100_0100(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 100, 100)
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}
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#[bench]
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fn bench_extend_from_slice_1000_1000(b: &mut Bencher) {
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do_bench_extend_from_slice(b, 1000, 1000)
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}
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fn do_bench_clone(b: &mut Bencher, src_len: usize) {
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let src: Vec<usize> = FromIterator::from_iter(0..src_len);
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b.bytes = src_len as u64;
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b.iter(|| {
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let dst = src.clone();
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assert_eq!(dst.len(), src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
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});
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}
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#[bench]
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fn bench_clone_0000(b: &mut Bencher) {
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do_bench_clone(b, 0)
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}
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#[bench]
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fn bench_clone_0010(b: &mut Bencher) {
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do_bench_clone(b, 10)
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}
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#[bench]
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fn bench_clone_0100(b: &mut Bencher) {
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do_bench_clone(b, 100)
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}
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#[bench]
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fn bench_clone_1000(b: &mut Bencher) {
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do_bench_clone(b, 1000)
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}
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fn do_bench_clone_from(b: &mut Bencher, times: usize, dst_len: usize, src_len: usize) {
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let dst: Vec<_> = FromIterator::from_iter(0..src_len);
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let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
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b.bytes = (times * src_len) as u64;
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b.iter(|| {
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let mut dst = dst.clone();
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for _ in 0..times {
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dst.clone_from(&src);
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assert_eq!(dst.len(), src_len);
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assert!(dst.iter().enumerate().all(|(i, x)| dst_len + i == *x));
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}
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});
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}
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#[bench]
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fn bench_clone_from_01_0000_0000(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 0, 0)
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}
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#[bench]
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fn bench_clone_from_01_0000_0010(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 0, 10)
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}
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#[bench]
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fn bench_clone_from_01_0000_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 0, 100)
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}
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#[bench]
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fn bench_clone_from_01_0000_1000(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 0, 1000)
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}
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#[bench]
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fn bench_clone_from_01_0010_0010(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 10, 10)
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}
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#[bench]
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fn bench_clone_from_01_0100_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 100, 100)
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}
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#[bench]
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fn bench_clone_from_01_1000_1000(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 1000, 1000)
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}
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#[bench]
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fn bench_clone_from_01_0010_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 10, 100)
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}
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#[bench]
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fn bench_clone_from_01_0100_1000(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 100, 1000)
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}
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#[bench]
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fn bench_clone_from_01_0010_0000(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 10, 0)
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}
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#[bench]
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fn bench_clone_from_01_0100_0010(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 100, 10)
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}
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#[bench]
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fn bench_clone_from_01_1000_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 1, 1000, 100)
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}
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#[bench]
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fn bench_clone_from_10_0000_0000(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 0, 0)
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}
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#[bench]
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fn bench_clone_from_10_0000_0010(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 0, 10)
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}
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#[bench]
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fn bench_clone_from_10_0000_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 0, 100)
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}
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#[bench]
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fn bench_clone_from_10_0000_1000(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 0, 1000)
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}
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#[bench]
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fn bench_clone_from_10_0010_0010(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 10, 10)
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}
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#[bench]
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fn bench_clone_from_10_0100_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 100, 100)
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}
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#[bench]
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fn bench_clone_from_10_1000_1000(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 1000, 1000)
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}
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#[bench]
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fn bench_clone_from_10_0010_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 10, 100)
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}
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#[bench]
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fn bench_clone_from_10_0100_1000(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 100, 1000)
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}
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#[bench]
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fn bench_clone_from_10_0010_0000(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 10, 0)
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}
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#[bench]
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fn bench_clone_from_10_0100_0010(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 100, 10)
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}
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#[bench]
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fn bench_clone_from_10_1000_0100(b: &mut Bencher) {
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do_bench_clone_from(b, 10, 1000, 100)
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}
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macro_rules! bench_in_place {
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(
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$($fname:ident, $type:ty , $count:expr, $init: expr);*
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) => {
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$(
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#[bench]
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fn $fname(b: &mut Bencher) {
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b.iter(|| {
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let src: Vec<$type> = black_box(vec![$init; $count]);
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let mut sink = src.into_iter()
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.enumerate()
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.map(|(idx, e)| { (idx as $type) ^ e }).collect::<Vec<$type>>();
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black_box(sink.as_mut_ptr())
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});
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}
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)+
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};
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}
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bench_in_place![
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bench_in_place_xxu8_i0_0010, u8, 10, 0;
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bench_in_place_xxu8_i0_0100, u8, 100, 0;
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bench_in_place_xxu8_i0_1000, u8, 1000, 0;
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bench_in_place_xxu8_i1_0010, u8, 10, 1;
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bench_in_place_xxu8_i1_0100, u8, 100, 1;
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bench_in_place_xxu8_i1_1000, u8, 1000, 1;
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bench_in_place_xu32_i0_0010, u32, 10, 0;
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bench_in_place_xu32_i0_0100, u32, 100, 0;
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bench_in_place_xu32_i0_1000, u32, 1000, 0;
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bench_in_place_xu32_i1_0010, u32, 10, 1;
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bench_in_place_xu32_i1_0100, u32, 100, 1;
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bench_in_place_xu32_i1_1000, u32, 1000, 1;
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bench_in_place_u128_i0_0010, u128, 10, 0;
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bench_in_place_u128_i0_0100, u128, 100, 0;
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bench_in_place_u128_i0_1000, u128, 1000, 0;
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bench_in_place_u128_i1_0010, u128, 10, 1;
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bench_in_place_u128_i1_0100, u128, 100, 1;
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bench_in_place_u128_i1_1000, u128, 1000, 1
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];
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#[bench]
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fn bench_chain_collect(b: &mut test::Bencher) {
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let data = black_box([0; LEN]);
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b.iter(|| data.iter().cloned().chain([1].iter().cloned()).collect::<Vec<_>>());
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}
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#[bench]
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fn bench_chain_chain_collect(b: &mut test::Bencher) {
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let data = black_box([0; LEN]);
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b.iter(|| {
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data.iter()
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.cloned()
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.chain([1].iter().cloned())
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.chain([2].iter().cloned())
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.collect::<Vec<_>>()
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});
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}
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#[bench]
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fn bench_nest_chain_chain_collect(b: &mut test::Bencher) {
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let data = black_box([0; LEN]);
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b.iter(|| {
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data.iter().cloned().chain([1].iter().chain([2].iter()).cloned()).collect::<Vec<_>>()
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});
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}
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pub fn example_plain_slow(l: &[u32]) -> Vec<u32> {
|
|
let mut result = Vec::with_capacity(l.len());
|
|
result.extend(l.iter().rev());
|
|
result
|
|
}
|
|
|
|
pub fn map_fast(l: &[(u32, u32)]) -> Vec<u32> {
|
|
let mut result = Vec::with_capacity(l.len());
|
|
for i in 0..l.len() {
|
|
unsafe {
|
|
*result.get_unchecked_mut(i) = l[i].0;
|
|
result.set_len(i);
|
|
}
|
|
}
|
|
result
|
|
}
|
|
|
|
const LEN: usize = 16384;
|
|
|
|
#[bench]
|
|
fn bench_range_map_collect(b: &mut test::Bencher) {
|
|
b.iter(|| (0..LEN).map(|_| u32::default()).collect::<Vec<_>>());
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_chain_extend_ref(b: &mut test::Bencher) {
|
|
let data = black_box([0; LEN]);
|
|
b.iter(|| {
|
|
let mut v = Vec::<u32>::with_capacity(data.len() + 1);
|
|
v.extend(data.iter().chain([1].iter()));
|
|
v
|
|
});
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_chain_extend_value(b: &mut test::Bencher) {
|
|
let data = black_box([0; LEN]);
|
|
b.iter(|| {
|
|
let mut v = Vec::<u32>::with_capacity(data.len() + 1);
|
|
v.extend(data.iter().cloned().chain(Some(1)));
|
|
v
|
|
});
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_rev_1(b: &mut test::Bencher) {
|
|
let data = black_box([0; LEN]);
|
|
b.iter(|| {
|
|
let mut v = Vec::<u32>::new();
|
|
v.extend(data.iter().rev());
|
|
v
|
|
});
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_rev_2(b: &mut test::Bencher) {
|
|
let data = black_box([0; LEN]);
|
|
b.iter(|| {
|
|
example_plain_slow(&data);
|
|
});
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_map_regular(b: &mut test::Bencher) {
|
|
let data = black_box([(0, 0); LEN]);
|
|
b.iter(|| {
|
|
let mut v = Vec::<u32>::new();
|
|
v.extend(data.iter().map(|t| t.1));
|
|
v
|
|
});
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_map_fast(b: &mut test::Bencher) {
|
|
let data = black_box([(0, 0); LEN]);
|
|
b.iter(|| map_fast(&data));
|
|
}
|