Rotobrush massive render time?

I have a 10 second clip --1920x1080 --on which I've created a rotobrush with a refined edge on the hair. I froze the mask after completing it which took forever. I didn't clock it, but it was easily over an hour.

Now I'm rendering this clip with some overlayed graphics and a simple shine effect on the background layer, and the render has taken over 2 hours.

I'm running After Effects CC on a Quad-Core MacPro with 10GB of ram. Something doesn't seem right about all this render time to me.

Anyone have any thoughts?

Thanks!