By utilizing the GPU and cacheAsBitmapMatrix this Box2D demo went from a sluggish 18 - 20 fps to a consistent 24 fps! Check out the demo in the video below: Turning on GPU Acceleration within AIR for Android: Open the application descriptor XML file associated with your project. Edit the render mode to include gpu [...]

Correction: Argh. This was a problem in two of my projects, including one I just created but now it's working on my third project. This may or may not be an issue depending on your setup. I'm going to try and isolate the problem and provide an update. End correction Not noticing improvement when selecting [...]