The TC1000 is more than 12 years old..... (it's that Tablet PC with a
Transmeta Crusoe)
I remember some old test that concluded that xfce is barely lighter than
gnome 2.
The only important thing is that it'll run fast enough....Maybe I'll try XFCE
on an old (P3) PC and see how it runs there.
But again, based on my experience with the *14-year-old* TC1000, my idea was
that the ability to hide window content when moving/resizing it seems to me
to be the most important factor to speed - which is more important than how
much of the system resources is taken.