diff --git a/core/vm/analysis_test.go b/core/vm/analysis_test.go
index 20674bf919d3..21b3e97e59c3 100644
--- a/core/vm/analysis_test.go
+++ b/core/vm/analysis_test.go
@@ -93,9 +93,7 @@ func BenchmarkJumpdestOpAnalysis(bench *testing.B) {
 		bits := make(bitvec, len(code)/8+1+4)
 		b.ResetTimer()
 		for i := 0; i < b.N; i++ {
-			for j := range bits {
-				bits[j] = 0
-			}
+			clear(bits)
 			codeBitmapInternal(code, bits)
 		}
 	}