CPU usage issue

http://cg.psdsliced.com/test1 - it seems the mouse-following orbs animation pushes cpu usage up to 100%, is there any way to get around that at all or am am I better off not using really cpu-intensive animations like this?

it’s generated all by code but uses one (maybe 2 i think…) instances of onEnterFrame which is probalbly what’s doing it…

any input welcome