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luke_luke_luke
Inspiring
June 7, 2012
Answered

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 🙂

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JoenesyCorrect answer
Participating Frequently
June 15, 2012

I did a couple of things that improved the framerate:

mouseEnabled = false;

mouseChildren = false;

no movieclips, only bitmaps, maybe sprites.

if you use movieclips for controls make sure they are not nested in a different movieclip that covers the whole screen. (avoid nesting as much as possible)

remove any text_input text fields

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7 replies

Joenesy
Participating Frequently
June 14, 2012

I have the exact same problem.. was wondering the same. My objects are stationairy, except for 5 object.. constant 60fps.. but when touching screen framrate drops, more fingers is even worse framedrop.. I'm at AIR 3.3, iphone 4.

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luke_luke_lukeAuthor
Inspiring
June 15, 2012

yep same thing,
Check this out :
http://stackoverflow.com/questions/3493802/as3-cpu-performance-with-100-movieclip-copies
I guess its because even though we aren't listening for events they still dispatching events ??

Try mouseEnabled=false maybe ? if that doesn't work try converting them to bitmaps or shapes?

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JoenesyCorrect answer
Participating Frequently
June 15, 2012

I did a couple of things that improved the framerate:

mouseEnabled = false;

mouseChildren = false;

no movieclips, only bitmaps, maybe sprites.

if you use movieclips for controls make sure they are not nested in a different movieclip that covers the whole screen. (avoid nesting as much as possible)

remove any text_input text fields

Translate
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