blob: 517b2816c3ded7b570f5d5d38f9ad81cb9ff071e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#![feature(test)]
extern crate test;
use crate::test::Bencher;
use futures::channel::oneshot;
use futures::executor::block_on;
use futures::future;
use futures::stream::{self, StreamExt};
use futures::task::Poll;
use futures_util::FutureExt;
use std::collections::VecDeque;
use std::thread;
#[bench]
fn oneshot_streams(b: &mut Bencher) {
const STREAM_COUNT: usize = 10_000;
const STREAM_ITEM_COUNT: usize = 1;
b.iter(|| {
let mut txs = VecDeque::with_capacity(STREAM_COUNT);
let mut rxs = Vec::new();
for _ in 0..STREAM_COUNT {
let (tx, rx) = oneshot::channel();
txs.push_back(tx);
rxs.push(rx);
}
thread::spawn(move || {
let mut last = 1;
while let Some(tx) = txs.pop_front() {
let _ = tx.send(stream::iter(last..last + STREAM_ITEM_COUNT));
last += STREAM_ITEM_COUNT;
}
});
let mut flatten = stream::iter(rxs)
.map(|recv| recv.into_stream().map(|val| val.unwrap()).flatten())
.flatten_unordered(None);
block_on(future::poll_fn(move |cx| {
let mut count = 0;
loop {
match flatten.poll_next_unpin(cx) {
Poll::Ready(None) => break,
Poll::Ready(Some(_)) => {
count += 1;
}
_ => {}
}
}
assert_eq!(count, STREAM_COUNT * STREAM_ITEM_COUNT);
Poll::Ready(())
}))
});
}
|
