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bench: update spawn benchmarks #3927

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merged 2 commits into from Jul 7, 2021
Merged

bench: update spawn benchmarks #3927

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b528685
bench: update spawn benchmarks
Darksonn Jul 5, 2021
3b86c47
rustfmt
Darksonn Jul 5, 2021
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70 changes: 45 additions & 25 deletions benches/spawn.rs
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Expand Up @@ -2,63 +2,83 @@
//! This essentially measure the time to enqueue a task in the local and remote
//! case.

#[macro_use]
extern crate bencher;

use bencher::{black_box, Bencher};

async fn work() -> usize {
let val = 1 + 1;
tokio::task::yield_now().await;
black_box(val)
}

fn basic_scheduler_local_spawn(bench: &mut Bencher) {
fn basic_scheduler_spawn(bench: &mut Bencher) {
let runtime = tokio::runtime::Builder::new_current_thread()
.build()
.unwrap();
runtime.block_on(async {
bench.iter(|| {
bench.iter(|| {
runtime.block_on(async {
let h = tokio::spawn(work());
black_box(h);
})
assert_eq!(h.await.unwrap(), 2);
});
});
}

fn threaded_scheduler_local_spawn(bench: &mut Bencher) {
fn basic_scheduler_spawn10(bench: &mut Bencher) {
let runtime = tokio::runtime::Builder::new_current_thread()
.build()
.unwrap();
runtime.block_on(async {
bench.iter(|| {
let h = tokio::spawn(work());
black_box(h);
})
bench.iter(|| {
runtime.block_on(async {
let mut handles = Vec::with_capacity(10);
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Probably doesn't matter, but I think you can alloc this once and reuse the same vec for each iteration.

for _ in 0..10 {
handles.push(tokio::spawn(work()));
}
for handle in handles {
assert_eq!(handle.await.unwrap(), 2);
}
});
});
}

fn basic_scheduler_remote_spawn(bench: &mut Bencher) {
let runtime = tokio::runtime::Builder::new_current_thread()
fn threaded_scheduler_spawn(bench: &mut Bencher) {
let runtime = tokio::runtime::Builder::new_multi_thread()
.worker_threads(1)
.build()
.unwrap();

bench.iter(|| {
let h = runtime.spawn(work());
black_box(h);
runtime.block_on(async {
let h = tokio::spawn(work());
assert_eq!(h.await.unwrap(), 2);
});
});
}

fn threaded_scheduler_remote_spawn(bench: &mut Bencher) {
let runtime = tokio::runtime::Builder::new_multi_thread().build().unwrap();

fn threaded_scheduler_spawn10(bench: &mut Bencher) {
let runtime = tokio::runtime::Builder::new_multi_thread()
.worker_threads(1)
.build()
.unwrap();
bench.iter(|| {
let h = runtime.spawn(work());
black_box(h);
runtime.block_on(async {
let mut handles = Vec::with_capacity(10);
for _ in 0..10 {
handles.push(tokio::spawn(work()));
}
for handle in handles {
assert_eq!(handle.await.unwrap(), 2);
}
});
});
}

bencher::benchmark_group!(
spawn,
basic_scheduler_local_spawn,
threaded_scheduler_local_spawn,
basic_scheduler_remote_spawn,
threaded_scheduler_remote_spawn
basic_scheduler_spawn,
basic_scheduler_spawn10,
threaded_scheduler_spawn,
threaded_scheduler_spawn10,
);

bencher::benchmark_main!(spawn);