** Summary changed: - ActivityIndicator much more CPU intensive under xvfb + ActivityIndicator much more CPU intensive
-- 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/1431957 Title: ActivityIndicator much more CPU intensive Status in ubuntu-ui-toolkit package in Ubuntu: Confirmed Bug description: Given: import QtQuick 2.3 import Ubuntu.Components 1.2 Item { width: childrenRect.width height: childrenRect.height Grid { columns: 20 Repeater { model: 400 ActivityIndicator { id: indicator running: true } } } Timer { interval: 10000 running: true onTriggered: Qt.quit() } } Running it under xvfb with current UITK: $ time xvfb-run -s "-screen 0 1024x1024x24" qmlscene testactivity.qml > 20,60s user 0,44s system 205% cpu 10,225 total When with the release before (1.1.1403+15.04.20150206-0ubuntu2¹): > 8,42s user 0,10s system 83% cpu 10,226 total As you can see the difference is more than double. The offending revision is 1222.1.16² that changes the ActivityIndicatorStyle's RotationAnimation to RotationAnimator, making sure that it runs on the rendering thread and is not blocked by the GUI thread. The difference in runs outside of xvfb are minimal, in favour of the new version: $ time qmlscene testactivity.qml > 1,13s user 0,18s system 12% cpu 10,412 total vs. > 1,13s user 0,13s system 12% cpu 10,415 total There is unfortunately some side-effect of this, the unity8 QML test suite went from taking under an hour to over two hours during our CI runs - see the attached trend chart. You can clearly see the spike at around job #563. Part of the increase is the fact that we were using the ActivityIndicator to force a render pass and cause waitForRendering() calls to return early, but the difference caused by that is about 10 minutes³, not an hour. ¹ https://launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/1.1.1403+15.04.20150206-0ubuntu2 ² http://bazaar.launchpad.net/~ubuntu-sdk-team/ubuntu-ui-toolkit/trunk/revision/1122.1.16 ³ https://jenkins.qa.ubuntu.com/job/unity-phablet-qmluitests-vivid/602/ ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: qtdeclarative5-ubuntu-ui-toolkit-plugin 1.2.1433+15.04.20150306-0ubuntu1 ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1 Uname: Linux 3.19.0-9-generic x86_64 ApportVersion: 2.16.2-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Fri Mar 13 17:11:18 2015 SourcePackage: ubuntu-ui-toolkit SystemImageInfo: current build number: 0 device name: channel: daily last update: Unknown UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/+bug/1431957/+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
