Using requestIdleCallback — Google Web Updates

requestIdleCallback is new performance API for scheduling work when the user is idle.

Source: Using requestIdleCallback — Google Web Updates

Another functionality from Google Chrome that can make our JavaScript execution faster with this already fast browser. As I say faster I mean that the user experience will be improved as this kind of functionality allows us to execute some heavy code while the user is idle: reading a block of text and not clicking at the time, etc. With feature detection you can implement that right now and I hope such things will be widely adopted.