| use std::collections::VecDeque; |
| use test::{black_box, Bencher}; |
| |
| #[bench] |
| fn bench_new(b: &mut Bencher) { |
| b.iter(|| { |
| let ring: VecDeque<i32> = VecDeque::new(); |
| black_box(ring); |
| }) |
| } |
| |
| #[bench] |
| fn bench_grow_1025(b: &mut Bencher) { |
| b.iter(|| { |
| let mut deq = VecDeque::new(); |
| for i in 0..1025 { |
| deq.push_front(i); |
| } |
| black_box(deq); |
| }) |
| } |
| |
| #[bench] |
| fn bench_iter_1000(b: &mut Bencher) { |
| let ring: VecDeque<_> = (0..1000).collect(); |
| |
| b.iter(|| { |
| let mut sum = 0; |
| for &i in &ring { |
| sum += i; |
| } |
| black_box(sum); |
| }) |
| } |
| |
| #[bench] |
| fn bench_mut_iter_1000(b: &mut Bencher) { |
| let mut ring: VecDeque<_> = (0..1000).collect(); |
| |
| b.iter(|| { |
| let mut sum = 0; |
| for i in &mut ring { |
| sum += *i; |
| } |
| black_box(sum); |
| }) |
| } |
| |
| #[bench] |
| fn bench_try_fold(b: &mut Bencher) { |
| let ring: VecDeque<_> = (0..1000).collect(); |
| |
| b.iter(|| black_box(ring.iter().try_fold(0, |a, b| Some(a + b)))) |
| } |