Complex anim built in CS3 - Would publish in CS4 increase performance?

Let’s say I’ve created a very complex animation that is a huge drain on CPU. It’s filled with all the things you should avoid if you want your animation to run smooth and efficient.

I’ve built it using CS3. Would there be any advantages or performance increase by bringing it into CS4 and publishing a new swf?

Does CS4 “compile” the movie better in any way?

Thanks all.