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[Alex <axfelix@xxxxxxxxx>]

It also might just be _Unity itself_, and increasingly it does seem like
Unity was written in a way that requires it to poll the entire
desktop(?) on a more frequent basis than the compositor would be doing
on its own, specifically in order to handle issues arising from xrandr
(monitor hotplugging) and other edge cases.

So far the three ways I've managed to crash the session after this "optimization"/breakage are:
- Hotplugging a display
- Super+D to show all windows again after hiding them
- Skype doing something weird when someone got added to a call (who the heck knows what Skype thinks it's doing with Xorg anyway)

So if these could be handled somehow without whatever it is that Unity
is doing normally to bottleneck ... I can't emphasize enough that it
really reverses my Unity/compiz stereotypes.

-- 
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Packages, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/1496525

Title:
  desktop is much smoother after toggling copy to texture in
  compizconfig

Status in compiz package in Ubuntu:
  Confirmed

Bug description:
  I just found this while trying to tweak performance in compizconfig --
  I'm currently running 14.04.3 with all of the available LTS-vivid
  packages and nvidia-346. The Unity desktop is much, much smoother
  after _toggling off_ "copy to texture" in compizconfig during a
  session. There don't seem to be any performance gains from starting up
  with it turned off; it has to be toggled mid-session.

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