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https://github.com/tokio-rs/tokio.git
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Carl Lerche
ee1c940709
The test-util feature flag is only intended to be used with tests. However, it is possible to enable it in release mode accidentally. This patch reduces the overhead of `Instant::now()` when the `test-util` feature flag is enabled but `time::pause()` is not called. The optimization is implemented by adding a static atomic flag that tracks if `time::pause()` has ever been called. In `Instant::now()`, the atomic flag is first checked before the thread-local and mutex are accessed.
15 lines
362 B
Rust
15 lines
362 B
Rust
#![cfg(all(feature = "full"))]
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use tokio::time::{Duration, Instant};
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#[tokio::test(start_paused = true)]
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async fn test_start_paused() {
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let now = Instant::now();
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// Pause a few times w/ std sleep and ensure `now` stays the same
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for _ in 0..5 {
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std::thread::sleep(Duration::from_millis(1));
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assert_eq!(now, Instant::now());
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}
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}
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