Adding touch events like you've described should not affect the framerate at all. I suspect you're not seeing the real framerate when not in a touch. When nothing moves on screen at all, C2 doesn't redraw the screen, so you'll likely hit 60 FPS (because it's not actually doing anything). As soon as you start changing stuff on screen it starts redrawing, so if you move an object in a touch it will start redrawing every frame and then you get a realistic framerate measurement. This doesn't mean the touch events are really slow, it just means you're seeing the real framerate, not 60 FPS because it's inactive.