src/libcollections/benches/vec_deque.rs

   1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use std::collections::VecDeque;
  12 use test::{Bencher, black_box};
  13
  14 #[bench]
  15 fn bench_new(b: &mut Bencher) {
  16     b.iter(|| {
  17         let ring: VecDeque<i32> = VecDeque::new();
  18         black_box(ring);
  19     })
  20 }
  21
  22 #[bench]
  23 fn bench_grow_1025(b: &mut Bencher) {
  24     b.iter(|| {
  25         let mut deq = VecDeque::new();
  26         for i in 0..1025 {
  27             deq.push_front(i);
  28         }
  29         black_box(deq);
  30     })
  31 }
  32
  33 #[bench]
  34 fn bench_iter_1000(b: &mut Bencher) {
  35     let ring: VecDeque<_> = (0..1000).collect();
  36
  37     b.iter(|| {
  38         let mut sum = 0;
  39         for &i in &ring {
  40             sum += i;
  41         }
  42         black_box(sum);
  43     })
  44 }
  45
  46 #[bench]
  47 fn bench_mut_iter_1000(b: &mut Bencher) {
  48     let mut ring: VecDeque<_> = (0..1000).collect();
  49
  50     b.iter(|| {
  51         let mut sum = 0;
  52         for i in &mut ring {
  53             sum += *i;
  54         }
  55         black_box(sum);
  56     })
  57 }