When I open a second window, FPS drops in half

3

Thanks, that makes sense.
My data so far:

  • 1 window with vsync on: 25 fps
  • 1 window with vsync off: 29 fps
  • 2 windows with vsync on: 15fps
  • 2 windows with vsync off: 20fps

So that kinda helped, but not completely.

Indeed I’m not issuing any draw calls in the second window - only in the first one.

Related:

I tried disableFrameRate(), didn’t help.