Expression engine slower in CS4?

[_Rickard_Boija_]

I've created a character animation system in AE7 with approximately 400 short expressions which connects layers in different comps to a control panel in the mastercomp.
In AE7 everything works smooth and I can animate using point controls connected to the layers via an IK-system. But when I upgraded to CS3, and now CS4 and tried the same projectfile, everything is painfully slow.

Is CS3 and CS4 slower in general when it comes to expressions, or do I have to build the system from scratch with CS4 to get it to work smooth?

[Mylenium]

No, but probably you are using OpenGL which as of CS4 will also be applied to nested pre-comps, hence there is considerable slowdown, if the number of items exceeds a certain number and they cannot be buffered.

Mylenium

[_Rickard_Boija_]

No, I'm not using OpenGL with my animation system and CS4.