Comment 36 for bug 496653

(In reply to comment #9)
> *** Bug 26816 has been marked as a duplicate of this bug. ***
>

I wasn't too sure about this when it was changed and running todays drt confirms for me, that they are not the same issue.

comment #4 has this as a dup of

http://bugzilla.kernel.org/show_bug.cgi?id=15328

which was a regression caused by a specific commit affecting 2D & 3D perf over time, which now seems to be fixed in current drt.

http://bugs.freedesktop.org/show_bug.cgi?id=26816

was not a regression and running todays drt has actually got worse (though possibly not same xserver) - I can't even play the vid I used in that bug using x11 now, mplayer shows 125% in vo.