AlbumenJ commented on code in PR #13155:
URL: https://github.com/apache/dubbo/pull/13155#discussion_r1349816635


##########
dubbo-common/src/main/java/org/apache/dubbo/rpc/model/ReflectionServiceDescriptor.java:
##########
@@ -89,6 +98,21 @@ private void initMethods() {
                     +" stream method signatures. method(" + methodName + ")");
         });
     }
+    
+    public static boolean isProtobufClass(Class<?> clazz) {
+        while (clazz != Object.class && clazz != null) {
+            Class<?>[] interfaces = clazz.getInterfaces();
+            if (interfaces.length > 0) {
+                for (Class<?> clazzInterface : interfaces) {
+                    if 
(PROTOBUF_MESSAGE_CLASS_NAME.equalsIgnoreCase(clazzInterface.getName())) {
+                        return true;
+                    }
+                }
+            }
+            clazz = clazz.getSuperclass();

Review Comment:
   I'm worried about whether judging every time will affect performance when 
init.



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