I wouldn't say "intense" processor activity but it does make compiz jump to 8% CPU usage here. Amarok must redraw some part of itself very rapidly triggering a damage event. I'm thinking this should be an amarok bug since this is just the way compiz works by design and it's obviously amarok doing something weird to make this happen.
** Changed in: compiz (Ubuntu) Status: Needs Info => Confirmed -- Intense processor activity when Amarok is maximized https://launchpad.net/bugs/77164 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs