The output of strace shows that fontconfig opens those file during every QML application startup.
A solution to this would be to introduce a caching system: after fontconfig opens and parses those files the first time it could serialize the result to disk for subsequent starts. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to fontconfig in Ubuntu. https://bugs.launchpad.net/bugs/1590804 Title: fontconfig initialization spends most of its time parsing XML configuration files in /etc/fonts/conf.d/ Status in Canonical System Image: New Status in fontconfig package in Ubuntu: New Bug description: While profiling the startup of QML apps on the BQ E4.5 phone (armhf) I noticed that a significant amount of time (around 35ms) was spent solely on parsing the XML configuration files in /etc/fonts/conf.d/ There seems to be around 40 files on Ubuntu Phone in that directory. To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1590804/+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
