# Box2DFlash performance on iPhone?

**URL:** <https://forum.kirupa.com/t/box2dflash-performance-on-iphone/318420>\
**Category:** flash\
**Created:** [January 19, 2011, 5:58pm UTC](https://forum.kirupa.com/t/box2dflash-performance-on-iphone/318420 "2011-01-19T17:58:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![slopps](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@slopps](https://forum.kirupa.com/u/slopps)\
**Post date:** [January 19, 2011, 5:58pm UTC](https://forum.kirupa.com/t/box2dflash-performance-on-iphone/318420/1 "2011-01-19T17:58:10Z")

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Does anyone have any knowledge of how Box2DFlash would perform on an iPhone if I were to write a game in AS3 and use the Export for iPhone feature of flash CS5?  
Is that going to be significantly, if at all, slower than if I wrote the game natively for iPhone using Cocos2D?

The problem is, I don’t have a Mac. This is a sample game I’m considering based on a motorcycle accident I was recently involved in:

[http://www.sammyjoeosborne.com/motoPhysics](http://www.sammyjoeosborne.com/motoPhysics)