Function Vs FrameEvent

Hi there all…

Is there a way… or what should I do,
I have a site wich is composed by a large SWF and within this movie there are a few more movieclips and each of them have EnterFrame ClipEvents…

This may cause my site to get slower, does it?
So I was thinking to replace those ClipEvents with something more inteligent; something that only start to run it script when need it, or somethink like that?

IS THERE ANY BODY OUT THERE with such knowledge to share me with?

Thanks! :alien: