Compiz is not a "window manager" in the traditional X11 sense. Technically unity-window-decorator is the window manager in Ubuntu. Compiz is a compositing window manager, which despite sounding similar is very different.
Compiz is responsible not only for the desktop effects, but for rendering every pixel of every window on the screen. All rendering is proxied through compiz so it can apply any effects to any part of the screen. So that's why compiz uses some CPU while any part of the screen is changing. But I'm sure compiz could do better, which is what this bug is all about. Certainly an unchanging desktop should result in compiz using zero CPU. And there are probably more parts of compiz that can be optimized to use less CPU. If only someone has the time to look into this bug more closely... -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/803943 Title: compiz consuming a lot of cpu To manage notifications about this bug go to: https://bugs.launchpad.net/compiz-core/+bug/803943/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : [email protected] Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp
