I really don't know what is going on but I just want a smooth experience in Windows 8 Apps.
I've tried just a simple platform controller square object sitting on top of a jump thru platform on the ground. moving left or right every second or so there is a blip and the controller sprite lags for a brief instant in what looks like lag.
The project runs fine in browsers just when i export to windows 8 and run i get this behaviour. I tested it on 2 different machines all showing the same thing.