Windows 8 phyiscs performance worse than IE10

I have made a few Windows 8 games and the performance has been fine.

However my newest one uses physics.

Testing in IE10 is fine with around 10-20 objects on the screen. The FPS stays at 60. However when I export to Windows 8 the framerate drops significantly. This is an older laptop with an Intel Core 2 duo and integrated graphics.

My understanding is that Windows 8 apps use the same rendering and javascript engine as IE10 so I am not sure why this would be the case. I would be perfectly happy if I got up to the frame rate of the IE10 version.

Any tips for how to improve the exported performance?

If you're running in Debug mode from Visual Studio, performance is reduced due to debugging overhead. Try running it directly from the start screen.

Thanks, that was the issue. I guess that it is more an issue than for my other games because physics is CPU limited.