use IndexByte replace Split to improve performance (#2500)

Co-authored-by: yonbiaoxiao <yonbiaoxiao@tencent.com>
Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>

utils.go

@@ -103,7 +103,10 @@ func parseAccept(acceptHeader string) []string {
 	parts := strings.Split(acceptHeader, ",")
 	out := make([]string, 0, len(parts))
 	for _, part := range parts {
-		if part = strings.TrimSpace(strings.Split(part, ";")[0]); part != "" {
+		if i := strings.IndexByte(part, ';'); i > 0 {
+			part = part[:i]
+		}
+		if part = strings.TrimSpace(part); part != "" {
 			out = append(out, part)
 		}
 	}