>From the attached backtrace, It seems that Qt calls FcInitReinitialize when populating its font database (a QGenericUnixFontDatabase instance provided by Qtubuntu) - that explains why re-parses the conf files everytime.
See http://code.qt.io/cgit/qt/qtbase.git/tree/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp?h=v5.4.1#n439 ** Attachment added: "backtrace.txt" https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1590804/+attachment/4689148/+files/backtrace.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1590804 Title: fontconfig initialization spends most of its time parsing XML configuration files in /etc/fonts/conf.d/ To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1590804/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs