On which platform? Seems to me that OS X El Capitán pretty much quiets a CPU in a background program, especially if the window is not even visible. Having sai

On which platform? Seems to me that OS X El Capitán pretty much quiets a CPU in a background program, especially if the window is not even visible. Having said that, it would be nice if they tone down the pointless animation in web pages or web-like interfaces.