check Len before locking (#108)

basically applying the same optimization that Pop has
anthdm · Dec 15, 2023 · 90f5a7a · 90f5a7a
1 parent 17bcc37
commit 90f5a7a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/ringbuffer/ringbuffer.go b/ringbuffer/ringbuffer.go
@@ -71,6 +71,9 @@ func (rb *RingBuffer[T]) Pop() (T, bool) {
 }
 
 func (rb *RingBuffer[T]) PopN(n int64) ([]T, bool) {
+	if rb.Len() == 0 {
+		return nil, false
+	}
 	rb.mu.Lock()
 	content := rb.content