Comment 4 for bug 1696305
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| Daniel van Vugt (vanvugt) wrote Re: High CPU usage in gnome-shell | #4 |
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0e1f616
(Get the code!)
Note gnome-shell's performance problems relate to redrawing the screen (ie. when anything on screen is changing).
For example: CPU usage playing Big Buck Bunny 1080p 60FPS:
Unity7/Xorg (fullscreen)
totem 80%
compiz 4%
Xorg 5%
Unity7/Xorg (windowed)
totem 80%
compiz 6%
Xorg 4%
Gnome/Wayland (fullscreen)
totem 120%
gnome-shell 40%
Gnome/Wayland (windowed)
totem 120%
gnome-shell 40%
You can ignore 'totem' - its performance is different probably because the Wayland code path is not yet as efficient as the Xorg one. The relevant point is that gnome-shell uses 4x the CPU of Xorg+compiz to draw the same thing...