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ensure Throttle never waits before the first chunk of data, even if it's timestamped after zero

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Tangent Wantwight 2020-09-11 22:56:24 -04:00
parent 43acf93fa9
commit 18fb8390a0
1 changed files with 4 additions and 3 deletions
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7
src/fixers.rs
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@ -115,10 +115,11 @@ impl<S: TryStream<Ok = Chunk> + Unpin> Stream for Throttle<S>
let next_chunk = self.stream.try_poll_next_unpin(cx); let next_chunk = self.stream.try_poll_next_unpin(cx);
if let Poll::Ready(Some(Ok(Chunk::Cluster(ref cluster_head, _)))) = next_chunk { if let Poll::Ready(Some(Ok(Chunk::Cluster(ref cluster_head, _)))) = next_chunk {
// we have actual data, so start the clock if we haven't yet
let start_time = self.start_time.get_or_insert_with(Instant::now);
// snooze until real time has "caught up" to the stream
let offset = Duration::from_millis(cluster_head.end); let offset = Duration::from_millis(cluster_head.end);
// we have actual data, so start the clock if we haven't yet;
// if we're starting the clock now, though, don't insert delays if the first chunk happens to start after zero
let start_time = self.start_time.get_or_insert_with(|| Instant::now() - offset);
// snooze until real time has "caught up" to the stream
let sleep_until = *start_time + offset; let sleep_until = *start_time + offset;
self.sleep.reset(sleep_until); self.sleep.reset(sleep_until);
} }