diff --git a/.example/other/test.go b/.example/other/test.go
index cd5867790..2fe3b9889 100644
--- a/.example/other/test.go
+++ b/.example/other/test.go
@@ -1,13 +1,29 @@
 package main
 
 import (
+	"encoding/hex"
 	"fmt"
-	"github.com/gogf/gf/os/gtimer"
-	"time"
+	"github.com/gogf/gf/encoding/gbase64"
+	"github.com/gogf/gf/util/gconv"
+	"github.com/gogf/gf/util/grand"
 )
 
-func main() {
-	tr := gtimer.New(100, 1*time.Second, 10)
-	tr.Add(1*time.Second, func() { fmt.Println("hello") })
-	select {}
+// bytesToHexString converts binary content to hex string content.
+func bytesToHexStr(b []byte) string {
+	dst := make([]byte, hex.EncodedLen(len(b)))
+	hex.Encode(dst, b)
+	return gconv.UnsafeBytesToStr(dst)
+}
+
+func main() {
+	b := make([]byte, 1024)
+	for i := 0; i < 1024; i++ {
+		b[i] = byte(grand.N(0, 255))
+	}
+
+	fmt.Println(bytesToHexStr(b))
+	fmt.Println(len(b))
+	fmt.Println(len(bytesToHexStr(b)))
+	fmt.Println(gbase64.EncodeToString(b))
+	fmt.Println(len(gbase64.EncodeToString(b)))
 }
diff --git a/encoding/gcompress/gcompress_gzip.go b/encoding/gcompress/gcompress_gzip.go
index fd5cc90a3..e6bd5f155 100644
--- a/encoding/gcompress/gcompress_gzip.go
+++ b/encoding/gcompress/gcompress_gzip.go
@@ -19,9 +19,11 @@ import (
 //
 // Note that it returns error if given <level> is invalid.
 func Gzip(data []byte, level ...int) ([]byte, error) {
-	var writer *gzip.Writer
-	var buf bytes.Buffer
-	var err error
+	var (
+		writer *gzip.Writer
+		buf    bytes.Buffer
+		err    error
+	)
 	if len(level) > 0 {
 		writer, err = gzip.NewWriterLevel(&buf, level[0])
 		if err != nil {
@@ -41,8 +43,10 @@ func Gzip(data []byte, level ...int) ([]byte, error) {
 
 // GzipFile compresses the file <src> to <dst> using gzip algorithm.
 func GzipFile(src, dst string, level ...int) error {
-	var writer *gzip.Writer
-	var err error
+	var (
+		writer *gzip.Writer
+		err    error
+	)
 	srcFile, err := gfile.Open(src)
 	if err != nil {
 		return err