I'm experiencing some very strange behaviour from my app regarding CPU usage on an iPad1. I noticed this whilst testing the app using XCode Instruments - Activity monotor.
I decided to create an empty app, nothing in it, no listeners, no display list and publish it.
When installed and launched on the iPad1 it was using a strady 2.5% cpu.
After I tap on the screen a few times I see the cpu usage rise, but not decrease. I'm currently looking at a 30% - 40% constant cpu usage for an empty app. It seems as though the app is not letting go of it's cpu resources, even though it obviously doesn't need it.
Does anyone have an idea why this is happening and what can be done to prevent it?
Thanks.
Details:
Flash Pro CS5.5
AIR 3.2
iPad1 running iOS 5.1.1
App published with CPU render mode.
I also published the same empty app using GPU render mode and got a similar result.