opt: use the std math/bits routine to count the bit length (panjf2000…

…#437)
sam-mix · Feb 5, 2023 · fbeb65d · fbeb65d
1 parent 0f41b37
commit fbeb65d
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/pkg/pool/ringbuffer/ringbuffer.go b/pkg/pool/ringbuffer/ringbuffer.go
@@ -19,6 +19,7 @@
 package ringbuffer
 
 import (
+	"math/bits"
 	"sort"
 	"sync"
 	"sync/atomic"
@@ -160,9 +161,8 @@ func index(n int) int {
 	n--
 	n >>= minBitSize
 	idx := 0
-	for n > 0 {
-		n >>= 1
-		idx++
+	if n > 0 {
+		idx = bits.Len(uint(n))
 	}
 	if idx >= steps {
 		idx = steps - 1