blob: 759021741a462b94f60c71dbee948b36e3502af4 [file] [log] [blame]
#![feature(test, futures_api)]
use futures::channel::oneshot;
use futures::executor::block_on;
use futures::future;
use futures::stream::{StreamExt, FuturesUnordered};
use futures::task::Poll;
use std::collections::VecDeque;
use std::thread;
use test::Bencher;
#[bench]
fn oneshots(b: &mut Bencher) {
const NUM: usize = 10_000;
b.iter(|| {
let mut txs = VecDeque::with_capacity(NUM);
let mut rxs = FuturesUnordered::new();
for _ in 0..NUM {
let (tx, rx) = oneshot::channel();
txs.push_back(tx);
rxs.push(rx);
}
thread::spawn(move || {
while let Some(tx) = txs.pop_front() {
let _ = tx.send("hello");
}
});
block_on(future::poll_fn(move |cx| {
loop {
if let Poll::Ready(None) = rxs.poll_next_unpin(cx) {
break
}
}
Poll::Ready(())
}))
});
}