Daniel, the performance drop with activated Unity is quite large, so my
eyes can catch the change in performance easily.
Animations, moving wobbly windows - all is much smoother without Unity.
But it is also possible to measure the performance drop with the Compiz
benchmark tool:
You just have to take a large window and move it around wildly, because
otherwise Compiz Standalone gets to sleep and shows just around 3-6 fps
here, which also shows that the damage detection seems to work, while
Unity always renders more than 20fps, even if your screen content almost
does not change.
If I move a big window around with Unity activated (dual-screen), the benchmark
never shows more than 28 fps.
With deactivated unityshell I can get it to show around 40-60 fps, which
reflects my observation.
om26er, this bug already was reported before (bug 988079), but it was
marked as fixed, which I cannot confirm here, so I decided to file a new
bug.
** Changed in: unity
Status: Incomplete => New
** Changed in: unity (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1049392
Title:
Unityshell slows down Compiz massively
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