With or Without audio. This is really bad performance.
I did a search and found a way to show FPS.
Every Tick -> GlobalFPS +1
Every 1Sec -> Show GlobalFPS and Set GlobalFPS to 0.
On PC, I got something around 60~70. Fine and Smooth.
iPhone , when there is just a plain background 40 FPS.
Moving the ball it drops to 10~15 FPS.
As the ball was creating an trail object always, I removed that to see if it was causing the drop. But it got only increment of 1~3 FPS. Getting final 15~18 FPS when moving ball.
I am running iOS 5 , but this performance is not good.
Resolution is 640x960.1 Tiled Background covering the screen + 5 Sprites + 1 Ball Sprite (Moving to the finger position every time). And I get this 15~18FPS. Maybe I'm doing something wrong.. If this is how it works, then Construct 2 isn't a good option for iPhone or Android development.
On the other hand it works very well over standard PC browsers.
Maybe I focus this for facebook apps, don't know.