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Message #01128
[Bug 1303746] Re: Performance hit when editing sorted lists
** Changed in: reminders-app
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1303746
Title:
Performance hit when editing sorted lists
Status in Ubuntu Reminders app:
Fix Released
Status in “qtdeclarative-opensource-src” package in Ubuntu:
Fix Released
Status in “qtdeclarative-opensource-src” source package in Trusty:
Fix Released
Bug description:
[Impact]
Performance regression from saucy in sorted lists, due to lacking a proper way to support layoutChange.
[Test Case]
We first noticed this after the migration to Qt 5.2 and using the Reminders app: in summary, when editing a note the application becomes unresponsive on the phone and the CPU goes to 100% on the desktop (there it's not too noticeable).
[Regression Potential]
No regressions spotted in utopic with the same patch. List views could be the place where also potential regression would be seen most likely.
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We first noticed this after the migration to Qt 5.2 and using the Reminders app: in summary, when editing a note the application becomes unresponsive on the phone and the CPU goes to 100% on the desktop (there it's not too noticeable).
After a chat with mzanetti, this is related to an upstream patch that
should have probably been implemented differently, and it's now
reported in the upstream tracker [1].
This will affect every app using a sorted list on the phone
[1] https://bugreports.qt-project.org/browse/QTBUG-37983
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References