Gnome Sluggish problem back

["G. Michael Carter" <mikey carterfamily ca>]

On first login it works great.  I get between 200ms - 500ms.   After opening about 20 applications I still get the 200ms - 500ms (small glitch on first open after that initial 20 app start)

After working for 1 hour or so, the overview page start to take a minimum of 2 seconds to pull up and the sonar animation on the hot corner only renders about 3-4 frames in that 2+ seconds.   With vlc running that overview page can take up to 10 seconds.

At this point even closing all applications does not get me back to the 500ms.  Also to note I think the entire gnome-shell slows down at this point.  Just don't really notice it, the overview page to select an application I haven't put on docky is the only time I actually notice the system is slow.

I've tried swapping the ATI card for a Nvidia card and not luck.  So it doesn't seem to be a problem with the graphic drivers.  Also works fine on my laptop.

Where should I start looking?   I've got two bugs open on this issue (one with Fedora and other with Gnome).    

Also I noticed on this machine the gtkperf sucks.   Total time is 22.32 seconds.  Where on the laptop (which is slower everything) it takes about 9.03 seconds.  Don't know if this is related.