Low FPS .. Sometimes? « cocos2d for iPhone

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Low FPS .. Sometimes?

(8 posts) (5 voices)

Started 2 years ago by Ryan
Latest reply from Tim

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Ryan
Member

Hi,

I'm about halfway through developing my first game. Everything's going well, apart from my framerate. It seems totally random. Sometimes when my app is run, it's very smooth, constant 60 fps, maybe slightly less every now and then, but other times the sprites do not move smoothy what so ever, they judder, at about 30 fps, but constantly changing, it becomes very annoying. I've tried deleting all my NSLogs which made the frame rate increase slightly, though it is still far from perfect. Seems strange to me how it is perfect sometimes though. Anything I can do to get a better frame rate?

Thanks
Ryan

Posted 2 years ago #
xStoryTeller
Member

Hmm, there isnt a lot of information to go on, all I can suggest is run Clang Static Analyzer and check for leaks and read this page : http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:best_practices

Hope it helps a bit,

xStoryTeller

Posted 2 years ago #
Tim
Member

Are you running in debug mode and see the deallocs in the console? Try running as a released version to get a better feel for frame rate. It goes without saying to try and preload as much as you can. If you're building actions on the fly maybe the timing is just right sometimes we're you're getting hammered with creation and execution of them?

There could be a multitude of reasons for the slow down ranging from attempting to play multiple sounds in rapid order to simply not cleaning up variables as you respawn more items (or not clean up particles when done as I found with Crazy Cupid).

Posted 2 years ago #
toolbird
Member

@Tim

How do you build reusable actions? Currently, I build all of my actions on the fly because I thought that was the only way it can be done. I have tried to build and store actions for reuse in the past and ran into a lot of problems. If you (or someone else) could shed some light on how to do this it would be greatly appreciated.

Posted 2 years ago #
Lam
Member

You can't create reusable actions but you can remove the deallocation/reallocation of actions by switching over to a scheduled method loop.

Posted 2 years ago #
toolbird
Member

@Lam

Could you elaborate on what you mean by "switching to a scheduled method loop"? I am not exactly sure how this would prevent dealloc/allocs of actions.

Posted 2 years ago #
Lam
Member

@toolbird
Sure! I wrote an answer to someone previously about reusing actions for effeciency here where I showed an example of a scheduled method loop below:
http://www.cocos2d-iphone.org/forum/topic/2701

Posted 2 years ago #
Tim
Member

@toolbird

I was referring to retained actions where I was doing the same thing with the same sprite (basically touch the sprite which caused it to move down then up). I recall seeing Lam's post a while back and found it interesting cause I recall getting beat up with the deallocs for another game (balloon-boy), but never got back around to creating all of my movements in a method. But I'm sure that would've helped me gain some FPS cause at times I had multiple actions that would coincidently end at the same time and they'd take their toll.

Posted 2 years ago #

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