I've opened an upstream bug here: https://bugs.freedesktop.org/show_bug.cgi?id=56891
CPU performance isn't that bad, almost a quarter of the i3 per thread. It's apparently just cairo rendering to the xlib/xcb backends that takes the big hit. I'm not sure why, either the intel driver on the i3 accelerates cairo really well or the tegra driver does extremely poorly. The weird thing is, cairo rendering to image backends is almost 10 times faster than to the x backends. I would try and exploit this to speed up Onboard, but then it would be the reverse on intel... Perhaps we need something closer to OpenGL for rendering, that's where the Tegra shines. I'm experimenting with a clutter right now ** Bug watch added: freedesktop.org Bugzilla #56891 https://bugs.freedesktop.org/show_bug.cgi?id=56891 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cairo in Ubuntu. https://bugs.launchpad.net/bugs/1070760 Title: 1st time running onboard with default theme is painfully slow Status in Onboard on-screen keyboard: Confirmed Status in Ubuntu on the Nexus 7: Confirmed Status in “cairo” package in Ubuntu: Confirmed Bug description: The current behavior tweak of onboard is to hide it when the session starts. This leads to a useability issue when starting the dash for the first time, e.g. as the dash opens and an empty onboard frame is rendered but not usable for 45 seconds. I would prefer to have the keyboard opened when the session starts and pay the price then, rather than randomly irritating the user the first time he/she tries to do input. To manage notifications about this bug go to: https://bugs.launchpad.net/onboard/+bug/1070760/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
