https://bugs.kde.org/show_bug.cgi?id=439723
Bug ID: 439723 Summary: While printing special sample file or generating a printer preview for it the UI freezes Product: okular Version: 21.04.3 Platform: Other OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: general Assignee: okular-devel@kde.org Reporter: pos...@posteo.eu Target Milestone: --- Created attachment 139981 --> https://bugs.kde.org/attachment.cgi?id=139981&action=edit Flamegraph for CPU1 STEPS TO REPRODUCE 1. Open https://bugs.kde.org/attachment.cgi?id=139894 in Okular 2. File -> Printer Preview OR 2. File -> Print OBSERVED RESULT Okular uses 100% of one core for several seconds and the UI freezes until the preview is finally generated. I tried to use perf to check what it's going on, please find the flamegraph.svg attached. It seems to run on the same thread as the UI if I am not mistaken? SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20210704 KDE Plasma Version: 5.22.2 KDE Frameworks Version: 5.83.0 Qt Version: 5.15.2 Kernel Version: 5.13.0-1-default (64-bit) Source: openSUSE TW repo and source build (master) -- You are receiving this mail because: You are the assignee for the bug.