It's not only the delay configuration Marc mentions. For me the static window switcher widget appears after a couple of seconds and is extremely laggy. If do alt+tab a couple of times Xorg cpu usage hits 100%.
It seems it broke with todays updates. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/772177 Title: Alt+Tab "Feels" slow -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
