Re: what is "Collect Files" doing under the hood? by Bartek Skorupa on Apr 29, 2011 at 9:08:40 pm
This is Finder that slows things down. Finder indexes stuff, so that Spotlight has easier access and does many other things under the hood.
After Effects ignores Finder when copying files. It goes "inside" the system and does it similarly to shell (Terminal).
This is not that Adobe does something better. It's Finder who does things slower.