bench: Add basic benchmarks

Replay of #31 with minor modifications

Signed-off-by: John Nunley <dev@notgull.net>

Cargo.toml

@@ -26,4 +26,12 @@ portable-atomic-util = { version = "0.1.5", optional = true }
 [dev-dependencies]
 futures = { version = "0.3", default-features = false, features = ["std"] }
 futures-lite = "2.3.0"
+criterion = { version = "0.3.4", default-features = false, features = ["cargo_bench_support"] }
 waker-fn = "1"
+
+[[bench]]
+name = "bench"
+harness = false
+
+[lib]
+bench = false

benches/bench.rs

@@ -0,0 +1,26 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+use event_listener::{Event, Listener};
+
+const COUNT: usize = 8000;
+
+fn bench_events(c: &mut Criterion) {
+ c.bench_function("notify_and_wait", |b| {
+ let ev = Event::new();
+ b.iter(|| {
+ let mut handles = Vec::with_capacity(COUNT);
+
+ for _ in 0..COUNT {
+ handles.push(ev.listen());
+ }
+
+ ev.notify(COUNT);
+
+ for handle in handles {
+ handle.wait();
+ }
+ });
+ });
+}
+
+criterion_group!(benches, bench_events);
+criterion_main!(benches);