diff --git a/emoji_test.go b/emoji_test.go
index fc2595d..cee544e 100644
--- a/emoji_test.go
+++ b/emoji_test.go
@@ -1,6 +1,9 @@
 package openwechat
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
 func TestFormatEmoji(t *testing.T) {
 	t.Log(FormatEmoji(`多吃点苹果<span class="emoji emoji1f34f"></span>`))
@@ -17,5 +20,27 @@ func TestSendEmoji(t *testing.T) {
 		t.Error(err)
 		return
 	}
-	_ , _= f.SendText(Emoji.Dagger)
+	_, _ = f.SendText(Emoji.Dagger)
+}
+
+func BenchmarkFormatEmojiString(b *testing.B) {
+	str := `多吃点苹果<span class="emoji emoji1f34f"></span>高兴<span class="emoji emoji1f604"></span> 生气<span class="emoji emoji1f64e"></span> 点赞<span class="emoji emoji1f44d"></span>`
+	b.SetBytes(int64(len(str)))
+	// b.N会根据函数的运行时间取一个合适的值
+	for i := 0; i < b.N; i++ {
+		FormatEmoji(str)
+	}
+}
+
+func BenchmarkFormatEmojiBlock(b *testing.B) {
+	str := ""
+	for ii := 0x1F301; ii <= 0x1F53D; ii++ {
+		str += fmt.Sprintf(`<span class="emoji emoji%x"></span> `, ii)
+	}
+	b.SetBytes(int64(len(str)))
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		FormatEmoji(str)
+	}
 }