Gpu for iphone 4s air 3.4 drop in performance

Hello, im building an air 3.4 actionscript mobile app in flash builder 4.7 for iphone. this is my first app.
the core function of this app is to play movieclips exported from flash in 1 swc.
the clips after added on stage are being scaled 4 times bigger, and played.
so the problem is that i found out you can change render mode in yourappname-app.xml
i changed it from auto - with auto on i have 60/60 fps - when i switched to gpu i get 20/60 fps and app starts to lagg.
i tested it on exported ipa's installed via itunes, test whas made on iphone 4s
what may be the cause of this? at what point is the gpu power for air mobile apps?
any advice? should i switch to air 3.5?

Hi,
if you have vector graphics changing into GPU can, as you say, make it slower.
If you want to improve performance with GPU mode you should try to change all the vector graphics into bitmaps. Also, change render mode to low helps.
I recommend you to google for adobe air performances. There is a LOT of information out there and you'll need to face every different case one by one depending your code and SWC.

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