40 lines
1.1 KiB
Rust
40 lines
1.1 KiB
Rust
use std::{collections::VecDeque, time::Instant};
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const VECDEQUE_LEN: i32 = 100000;
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const WARMUP_N: usize = 100;
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const BENCH_N: usize = 1000;
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fn main() {
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if cfg!(miri) {
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// Don't benchmark Miri...
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// (Due to bootstrap quirks, this gets picked up by `x.py miri library/alloc --no-doc`.)
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return;
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}
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let a: VecDeque<i32> = (0..VECDEQUE_LEN).collect();
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let b: VecDeque<i32> = (0..VECDEQUE_LEN).collect();
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for _ in 0..WARMUP_N {
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let mut c = a.clone();
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let mut d = b.clone();
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c.append(&mut d);
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}
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let mut durations = Vec::with_capacity(BENCH_N);
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for _ in 0..BENCH_N {
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let mut c = a.clone();
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let mut d = b.clone();
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let before = Instant::now();
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c.append(&mut d);
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let after = Instant::now();
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durations.push(after.duration_since(before));
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}
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let l = durations.len();
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durations.sort();
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assert!(BENCH_N % 2 == 0);
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let median = (durations[(l / 2) - 1] + durations[l / 2]) / 2;
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println!("\ncustom-bench vec_deque_append {:?} ns/iter\n", median.as_nanos());
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}
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