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#![feature(test)]
extern crate test;
use async_std::sync::{Arc, Mutex};
use async_std::task;
use test::Bencher;
#[bench]
fn create(b: &mut Bencher) {
b.iter(|| Mutex::new(()));
}
#[bench]
fn contention(b: &mut Bencher) {
b.iter(|| task::block_on(run(10, 1000)));
}
#[bench]
fn no_contention(b: &mut Bencher) {
b.iter(|| task::block_on(run(1, 10000)));
}
async fn run(task: usize, iter: usize) {
let m = Arc::new(Mutex::new(()));
let mut tasks = Vec::new();
for _ in 0..task {
let m = m.clone();
tasks.push(task::spawn(async move {
for _ in 0..iter {
let _ = m.lock().await;
}
}));
}
for t in tasks {
t.await;
}
}
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