Severe frame rate drop when touching screen iOS

Hi there,
I have a simple app with 2000 clips scrolling up the stage with a bitmap in each. They are moving around blazingly fast at 60 fps.
But the moment I even put a finger on the screen the fps drops to around 40 if i move my finger it drops down to 30 fps.
is this normal behavior ?
there are no event listeners or anything like that.
thanks :-)

Applauz78 wrote:
I have a UI that is the first thing present in my app. It has a grid of buttons. I contain all the buttons (movieclips) inside of 1 main movieclip (interfact_mc) and I'm not seeing a framerate drop when interacting with them. GPU rendering with a constant 60fps.
I am sorry but this doesn't allow to conclude to anything because :
If your app is showing 60 fps, it could (just picking numbers for the example) mean a theoric 200 fps and a drop to 65 fps when you move your finger on the screen (tapping has less impact) = 10 ms each frame which is the same as a drop from 59fps to 40fps. It just mean your app is not eating much (and that is a good thing but not helping).
I also suppose devices, publish mode etc, impacts.
I made some tests here trying to be as precise as possible : http://forums.adobe.com/message/4880341
If you found out any reason/possibility to avoid this, I would be very interested. I could try to unest evertyhing but since everything is already tested with mouseEnabled/children false... I find it quite wrong.

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Severe frame rate drop when touching screen iOS

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