diff --git a/internal/re/regexp.go b/internal/re/regexp.go
index 6eb6680..6ce892e 100644
--- a/internal/re/regexp.go
+++ b/internal/re/regexp.go
@@ -136,6 +136,10 @@ func (this *Regexp) Match(s []byte) bool {
 	return this.rawRegexp.Match(s)
 }
 
+func (this *Regexp) FindStringSubmatch(s string) []string {
+	return this.rawRegexp.FindStringSubmatch(s)
+}
+
 // ParseKeywords 提取表达式中的关键词
 func (this *Regexp) ParseKeywords(exp string) (keywords []string) {
 	if len(exp) == 0 {
diff --git a/internal/re/regexp_test.go b/internal/re/regexp_test.go
index 4d6cfa5..7e7b955 100644
--- a/internal/re/regexp_test.go
+++ b/internal/re/regexp_test.go
@@ -125,11 +125,36 @@ func BenchmarkRegexp_MatchString2(b *testing.B) {
 func BenchmarkRegexp_MatchString_CaseSensitive(b *testing.B) {
 	var r = re.MustCompile("(abc|def|ghi)")
 	b.Log("keywords:", r.Keywords())
+	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
 		r.MatchString("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
 	}
 }
 
+func BenchmarkRegexp_MatchString_CaseSensitive2(b *testing.B) {
+	var r = regexp.MustCompile("(abc|def|ghi)")
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		r.MatchString("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
+	}
+}
+
+func BenchmarkRegexp_MatchString_VS_FindSubString1(b *testing.B) {
+	var r = re.MustCompile("(?i)(chrome)")
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = r.Raw().MatchString("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
+	}
+}
+
+func BenchmarkRegexp_MatchString_VS_FindSubString2(b *testing.B) {
+	var r = re.MustCompile("(?i)(chrome)")
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = r.Raw().FindStringSubmatch("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36")
+	}
+}
+
 func testCompareStrings(s1 []string, s2 []string) bool {
 	if len(s1) != len(s2) {
 		return false