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Fix Once perf regression #54662

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Merged
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Oct 1, 2018
Merged

Fix Once perf regression #54662

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1 change: 1 addition & 0 deletions src/libstd/sync/once.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -330,6 +330,7 @@ impl Once {
/// assert_eq!(INIT.is_completed(), false);
/// ```
#[unstable(feature = "once_is_completed", issue = "42")]
#[inline]
pub fn is_completed(&self) -> bool {
// An `Acquire` load is enough because that makes all the initialization
// operations visible to us, and, this being a fast path, weaker
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