update the performance

logs/logger_test.go

@@ -15,9 +15,9 @@
 package logs
 
 import (
+	"bytes"
 	"testing"
 	"time"
-	"bytes"
 )
 
 func TestFormatHeader_0(t *testing.T) {
@@ -72,4 +72,4 @@ func TestNewAnsiColor2(t *testing.T) {
 	if w1 != w2 {
 		t.Errorf("Get %#v, want %#v", w1, w2)
 	}
-}
+}