From 4a6bc77a0160a4540dea03e39642c373ca9f2a69 Mon Sep 17 00:00:00 2001
From: Ivan Tham <pickfire@riseup.net>
Date: Tue, 22 Sep 2020 14:26:15 +0800
Subject: [PATCH] Liballoc bench vec use mem take not replace

---
 library/alloc/benches/vec.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/library/alloc/benches/vec.rs b/library/alloc/benches/vec.rs
index b295342f361..687efa8e9e7 100644
--- a/library/alloc/benches/vec.rs
+++ b/library/alloc/benches/vec.rs
@@ -241,7 +241,7 @@ fn bench_extend_recycle(b: &mut Bencher) {
     let mut data = vec![0; 1000];
 
     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());
         to_extend.extend(tmp.into_iter());
         data = black_box(to_extend);
@@ -500,7 +500,7 @@ fn bench_in_place_recycle(b: &mut Bencher) {
     let mut data = vec![0; 1000];
 
     b.iter(|| {
-        let tmp = std::mem::replace(&mut data, Vec::new());
+        let tmp = std::mem::take(&mut data);
         data = black_box(
             tmp.into_iter()
                 .enumerate()
@@ -520,7 +520,7 @@ fn bench_in_place_zip_recycle(b: &mut Bencher) {
     rng.fill_bytes(&mut subst[..]);
 
     b.iter(|| {
-        let tmp = std::mem::replace(&mut data, Vec::new());
+        let tmp = std::mem::take(&mut data);
         let mangled = tmp
             .into_iter()
             .zip(subst.iter().copied())