cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   Decept
   Member

   I have a game which uses really big 24bit png backgrounds that I can scroll and zoom with multi-touch. When I run it on my 1st gen iPod touch the idle fps is a constant 60 and around 50 when scrolling. On my iPhone 3G I get an idle fps of 47-60 and 27-50 while scrolling, which is very jerky.

   Exact same build, Release, 2.2 SDK, no thumb compilation, cocos2d 0.8.2. iPod running OS 2.2.1 and iPhone 3.0. cocos2d debug output is off and no NSLog statements.

   How can this be? Anything specific I should look into?

   Posted 2 years ago #
2. 

   jd
   Member

   Try adding this in appdelegate:
   

   if ( ![Director setDirectorType:CCDirectorTypeDisplayLink] )
   [Director setDirectorType:CCDirectorTypeThreadMainLoop];

   Posted 2 years ago #
3. 

   Decept
   Member

   Unfortunately that didn't make any difference. I tried changing the animation interval to 1/30 instead and now I have a constant fps of 30. The problem is that 30 is not really enough, it's nowhere near as smooth as 60. And it still doesn't answer the question why the game is faster on the old iPod touch.

   Posted 2 years ago #
4. 

   Steve Oldmeadow
   Administrator

   Do you have any audio? Also try using Instruments or Shark to find the bottlenecks on the iPhone. Also if the iPhone is jailbroken it could be an issue.

   Posted 2 years ago #
5. 

   Blue Ether
   Member

   Not sure why there is any confusion about this. The iPod touch always has been faster than the 3G. Excluding the latest 3GS, the 1st gen iPod Touch has best performance, followed closely by 2nd gen iPod Touch, and then the iPhones.

   As Oldmeadow said compressed audio running can be an issue as well. Big 24-bit PNGs alone could be enough to cause a bottleneck. Depends on how big, how many, and what else is going on. Remember extensive memory usage can be just as much a cause of slowdown as processing demands.

   Posted 2 years ago #
6. 

   Steve Oldmeadow
   Administrator

   "...the 1st gen iPod Touch has best performance"

   What are you basing that on Blue Ether, it isn't my experience nor what is said here:

   http://toucharcade.com/2008/11/23/2nd-generation-ipod-touch-faster-than-iphone/

   Posted 2 years ago #
7. 

   Decept
   Member

   I only play 1 small wav file when the user taps certain sprites, I monitored the fps without tapping.
   Neither device is jailbroken.

   Posted 2 years ago #

RSS feed for this topic

Reply

You must log in to post.