I had the same problem. I did what #15 ( https://bugs.launchpad.net/compiz/+bug/1293384/comments/15 ) suggested and, so far, I only have a spike periodically (primarily when I do anything with the windows and when I switch workspaces).
I did not do the part about editing the /usr/share/gnome-session/sessions/ubuntu.session file as that change removed my action bar (the bar on the left side with the ubuntu icon).
I think this might be a step in the correct direction, in terms of a work around.
Here is my two cents:
I had the same problem. I did what #15 ( https:/ /bugs.launchpad .net/compiz/ +bug/1293384/ comments/ 15 ) suggested and, so far, I only have a spike periodically (primarily when I do anything with the windows and when I switch workspaces).
I did not do the part about editing the /usr/share/ gnome-session/ sessions/ ubuntu. session file as that change removed my action bar (the bar on the left side with the ubuntu icon).
I think this might be a step in the correct direction, in terms of a work around.