Use OrbitControls and requestAnimationFrame

[Flyingbeanss]

Hi, it's a amazing program and I'm very interested in it.
I have some questions , I notice that OrbitControls and requestAnimationFrame is not used, and after I add some line2 (about 500), the FPS is very low. Is there any reason why OrbitControls and requestAnimationFrame are not used? And I want to know if the fps can be improved if I use them？

[kovacsv]

500 lines should not affect the performance, and I don't think OrbitControls or requestAnimationFrame has to do anything with it. Could you share what you have tried?