Vista - Pre-compile script?

I'm continuing with my class definition snapin, but I'm experiencing
some pretty bad performance (not particularly surprising). What happens
when a method is called right now is this:

new runspace
load $this, $args, and private accessibility functions.
invoke script block

Now, one way to save performance would be to open the runspace in a
constructor and keep it with the object until it gets finalized.

My question is this: is there some way I can have my script pre-compiled
or pre-parsed for the runspace? Or some other way I can speed things up?

Thanks,
Nick Howell