Off-main-thread HTML parsing in Servo
I wish browser vendors would make stand at this point and say in 1 year all major browser engines will stop supporting document.write - it's horrible for developers to use and no-one I know advocates it - but I'm fairly sure ad networks still use it for no reason whatsoever.The implementation of browsers is already difficult enough!  It's great to see the lengths Servo is going to to be compatible, but on this one I say warn developers and deprecate this feature that no-one in 2017 should ever use.