This might be a direct duplicate of bug 1494795. Because that was about 100% CPU on arale, which might be the same as only 23% CPU on a desktop or whatever you're using.
** Tags added: performance ** Changed in: ubuntu-ui-toolkit (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ubuntu-ui-toolkit in Ubuntu. https://bugs.launchpad.net/bugs/1604029 Title: UCUnits::resolveResource takes up to 23% of CPU time when scrolling a long Unity8-dash Scope Status in ubuntu-ui-toolkit package in Ubuntu: New Bug description: According to the attached callgrind trace (obtaining scrolling up/down the fake_ubrick_scope) one can see that calls to Image item setSource end up intercepted by UCQQuickImageExtension::setSource that goes ends up in UCUnits::resolveResource That takes 23% of the total CPU time looking for which file to actually open. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/+bug/1604029/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp