Empty NodePath issue

All nodepath of my scene are reparent to one node called root node.

  1. I create 1 root node for my scene then reparent to render : FPS ~ 30

  2. I create 3 root node for my scene, then reparent one of them to render : FPS - 10

FPS is smaller while I use only one root node like the first case. Why ? And how to fix it ?

(I used rootNode = NodePath(“root node”) to create root node)

Can you provide a test case that demonstrates the issue?

Sorry, because of my computer’s error. Now everything ok ^^