sync::mpsc: quadratic backoff

fee1-dead-contrib · Nov 10, 2022 · 8dddb22 · 8dddb22
1 parent 7b721ed
commit 8dddb22
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/library/std/src/sync/mpmc/utils.rs b/library/std/src/sync/mpmc/utils.rs
@@ -110,7 +110,8 @@ impl Backoff {
  /// progress.
  #[inline]
  pub fn spin(&self) {
- for _ in 0..1 << self.step.get().min(SPIN_LIMIT) {
+ let step = self.step.get().min(SPIN_LIMIT);
+ for _ in 0..step.pow(2) {
  crate::hint::spin_loop();
  }
 
@@ -123,7 +124,7 @@ impl Backoff {
  #[inline]
  pub fn snooze(&self) {
  if self.step.get() <= SPIN_LIMIT {
- for _ in 0..1 << self.step.get() {
+ for _ in 0..self.step.get().pow(2) {
  crate::hint::spin_loop()
  }
  } else {