We recently had to remove this library from our application as it was causing the CPU to be pegged at 100% even when the window's effects were not enabled. We had everything set up with the default configuration.
The problem line looked to be here: https://github.com/conopsys/COSTouchVisualizer/blob/master/Classes/COSTouchVisualizerWindow.m#L222
This timer constantly runs the target method for us even if the app user doesn't have the touch effects enabled at all, which is not ideal. Even if the effect was on, the timer shouldn't run if the visualization is not currently happening.