[Ayatana] why compiz in place of mutter

[supernova <supernova.it@xxxxxxxxx>]

Goodmorning (GMT+1) to all. Yesterday I tried Precise, and it works
very good. I have seen that it is a bit slower and more fat than the
gnome-shell, as it happened for 11.10, 11.04, ... . I guess it is due
to compiz, which is more heavy than mutter. Why don't use mutter then?
Unity doesn't use effects as rotation and wobbly. So mutter could be
sufficient.

Bests,
Supernova