programmatically detecting performance issues?

[doublemazaa]

I'm working on a project which has some CPU performance issues, mostly from rendering items that are somewhat transparent.

Looks great on fast machines, but gets dogged down on slower machines. Does anyone have any good methods for ways to detect if the app is slowing down on the client machine? If I could detect this I could tailor the elements a bit to improve performance on older machines. Any suggestions?

[irrationalistic]

You could potentially just calculate out the FPS of your movie. If it starts to drop, you could do your custom low-end tailoring.

Quick google search got me this result: http://www.actionscript.org/forums/showthread.php3?t=171724