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Rollup merge of #77044 - pickfire:patch-4, r=jyn514

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Liballoc bench vec use mem take not replace
This commit is contained in:
Jonas Schievink 2020-09-25 02:29:35 +02:00 committed by GitHub
commit 67bcf04bdb
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1 changed files with 3 additions and 3 deletions
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6
library/alloc/benches/vec.rs
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@ -241,7 +241,7 @@ fn bench_extend_recycle(b: &mut Bencher) {
let mut data = vec![0; 1000]; let mut data = vec![0; 1000];
b.iter(|| { b.iter(|| {
let tmp = std::mem::replace(&mut data, Vec::new()); let tmp = std::mem::take(&mut data);
let mut to_extend = black_box(Vec::new()); let mut to_extend = black_box(Vec::new());
to_extend.extend(tmp.into_iter()); to_extend.extend(tmp.into_iter());
data = black_box(to_extend); data = black_box(to_extend);
@ -500,7 +500,7 @@ fn bench_in_place_recycle(b: &mut Bencher) {
let mut data = vec![0; 1000]; let mut data = vec![0; 1000];
b.iter(|| { b.iter(|| {
let tmp = std::mem::replace(&mut data, Vec::new()); let tmp = std::mem::take(&mut data);
data = black_box( data = black_box(
tmp.into_iter() tmp.into_iter()
.enumerate() .enumerate()
@ -520,7 +520,7 @@ fn bench_in_place_zip_recycle(b: &mut Bencher) {
rng.fill_bytes(&mut subst[..]); rng.fill_bytes(&mut subst[..]);
b.iter(|| { b.iter(|| {
let tmp = std::mem::replace(&mut data, Vec::new()); let tmp = std::mem::take(&mut data);
let mangled = tmp let mangled = tmp
.into_iter() .into_iter()
.zip(subst.iter().copied()) .zip(subst.iter().copied())