compiz team mailing list archive

[Daniel van Vugt <vanvugt@xxxxxxxxx>]

That is to be expected. Using pure buffer swaps is (presently) much more
CPU intensive for compiz than the default rendering method, because it
(presently) has to redraw every part of the screen on every frame (60
times per second). The default rendering method for compiz only tries to
redraw what changes, but doesn't use buffer swapping so will cause
tearing.

It's a trade-off, and obviously why "Force full screen redraws (buffer
swap) on repaint" is not turned on by default. I hope that we can
eventually make buffer swapping efficient enough that it can be turned
on by default (part of the fix for bug 880707, but apparently also in
progress upstream in compiz).

-- 
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packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/861061

Title:
  Running compiz makes 3D apps like glxspheres (VirtualGL) perform
  worse.

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