Bad rendering, performance, lag

I am using Cocos Creator 2.2. I try to renderer a lot of objects in Dialog(like setting dialog, there are alot of thing there) and then every time i open this dialog then it is DEPLAY and LAG, CPU is so high. Therefore i use profile tool to check this problem then found a problem to be RENDER component. Every active node they will rescue all child note and drawing… How to resole this problem, this is effecting BAD for user friendly and experience, thanks for everyone!