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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 03:57:31 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 03:57:31 +0000 |
commit | dc0db358abe19481e475e10c32149b53370f1a1c (patch) | |
tree | ab8ce99c4b255ce46f99ef402c27916055b899ee /library/core/benches/iter.rs | |
parent | Releasing progress-linux version 1.71.1+dfsg1-2~progress7.99u1. (diff) | |
download | rustc-dc0db358abe19481e475e10c32149b53370f1a1c.tar.xz rustc-dc0db358abe19481e475e10c32149b53370f1a1c.zip |
Merging upstream version 1.72.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/core/benches/iter.rs')
-rw-r--r-- | library/core/benches/iter.rs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/library/core/benches/iter.rs b/library/core/benches/iter.rs index 60ef83223..5ec22e514 100644 --- a/library/core/benches/iter.rs +++ b/library/core/benches/iter.rs @@ -2,6 +2,7 @@ use core::borrow::Borrow; use core::iter::*; use core::mem; use core::num::Wrapping; +use core::ops::Range; use test::{black_box, Bencher}; #[bench] @@ -69,6 +70,57 @@ fn bench_max(b: &mut Bencher) { }) } +#[bench] +fn bench_range_step_by_sum_reducible(b: &mut Bencher) { + let r = 0u32..1024; + b.iter(|| { + let r = black_box(r.clone()).step_by(8); + + let mut sum: u32 = 0; + for i in r { + sum += i; + } + + sum + }) +} + +#[bench] +fn bench_range_step_by_loop_u32(b: &mut Bencher) { + let r = 0..(u16::MAX as u32); + b.iter(|| { + let r = black_box(r.clone()).step_by(64); + + let mut sum: u32 = 0; + for i in r { + let i = i ^ i.wrapping_sub(1); + sum = sum.wrapping_add(i); + } + + sum + }) +} + +#[bench] +fn bench_range_step_by_fold_usize(b: &mut Bencher) { + let r: Range<usize> = 0..(u16::MAX as usize); + b.iter(|| { + let r = black_box(r.clone()); + r.step_by(64) + .map(|x: usize| x ^ (x.wrapping_sub(1))) + .fold(0usize, |acc, i| acc.wrapping_add(i)) + }) +} + +#[bench] +fn bench_range_step_by_fold_u16(b: &mut Bencher) { + let r: Range<u16> = 0..u16::MAX; + b.iter(|| { + let r = black_box(r.clone()); + r.step_by(64).map(|x: u16| x ^ (x.wrapping_sub(1))).fold(0u16, |acc, i| acc.wrapping_add(i)) + }) +} + pub fn copy_zip(xs: &[u8], ys: &mut [u8]) { for (a, b) in ys.iter_mut().zip(xs) { *a = *b; |