diff --git a/iteration/iter.go b/iteration/iter.go
index 1b6db89..54f1125 100644
--- a/iteration/iter.go
+++ b/iteration/iter.go
@@ -1,10 +1,16 @@
 package iteration
 
+import "strings"
+
 // Repeat takes a string and repeat it 5 times
 func Repeat(s string, repeatTime int) string {
-	var res string
-	for i := 0; i < repeatTime; i++ {
-		res += s
-	}
-	return res
+	// // Bench: 170ns
+	// var res string
+	// for i := 0; i < repeatTime; i++ {
+	// 	res += s
+	// }
+	// return res
+
+	// Bench: 70ns
+	return strings.Repeat(s, repeatTime)
 }