Just got around to downloading 1.1.9 for MacOS. Running the example applications I am seeing CPU usage high when the applications aren't even being interacted with. The XamlPlayer with the car dashboard example is sat at around 20% CPU as I type this in the browser window. Is this "normal"?

Our applications (XamlPlayer included) repaint all the screen on each frame being interacted with or not. It is the best way to profile the worst "case". In the future we could add an incremental mode (we have plans to incorporate a dirty block regions algorithm) to the player. For now, I would say that the behavior is "normal".