Description of problem: I have a huge presentation 200 slides that containing a lot of cross-reference to the different slides. When i try to open the document, I can't use libreoffice for 50 minutes or longer. The CPU processing is stick to 1 core. When I remove/de-install: libreoffice-gtk3 and libreoffice-gtk2,then the processing time is reduced by 4 minutes, and i can use the user interface. The CPU processing is spread out to 2 cores. So it looks likes that using the libreoffice-gtk3 modules, libreoffice will be limited to use 1 core for processing. Version-Release number of selected component (if applicable): libreoffice-gtk2-5.3.7.2-1.fc26.x86_64 libreoffice-gtk3-5.3.7.2-1.fc26.x86_64 How reproducible: Create a hoge impress document with a lot of images and references. Try to open the and edit the document with and without libreoffice-gtk2 and libreoffice-gtk3. See the differences between processing. Steps to Reproduce: 1.Create a huge impress (200 slides with a lot of cross references) document and save this one 2.Re-open and edit the document Actual results: - The user interface became unusable; - The program is freezing for 50 minutes; - The CPU utilization is high 100% - The libreoffice proces is stick to 1 core Expected results: - The user interface is usable - The CPU load is high - The libreoffice proces is spread to multiple cores. Additional info: The seems to be a lot of performance issues in combination of libreoffice-gtk2 and libreoffice-gtk3. Some are solved but not al. See: - https://bugzilla.redhat.com/show_bug.cgi?id=1303562 - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=837356 - https://ubuntuforums.org/showthread.php?t=2322879
I love the "create a huge impress document with 200 slides" step to reproduce :-), any chance of a concrete already existing example ? There is no difference in the (minimal amount) threading between vcl plugs, idle handing is definitely different however which might be a factor
I sent you in private the 'complex' document.
Any news?
The problem stil exist with LibreOffcie version 5.4.5.1 and Fedora 28
Is there some-one else who I can sent the document?
no, I'm what there is on this. My suggestion at http://nabble.documentfoundation.org/Why-does-the-GTK3-vcl-sal-plugin-default-to-SvpSalGraphics-software-rendering-tt4232928.html#a4232945 might help this. Or it might be something else entirely, performance bugs tend to be tarpits
Does libreoffice >= 5.4.6.2-4.fc27 make any difference now (for gtk3) after the improvements for bug 1396729 ?
The speed of libre-office is somewhat improved, especially the graphics. But libre-office in combination with gtk3 is stil unusable for large presentations. With libreoffice-gtk3-6.0.3.2-10.fc28.x86_64 installed and enabled. - My CPU Core stay at 99% busy for the soffice.bin process - I can't use the user interface, it continues blocked - Mouse respons is much to slow. Without any gtk library installed - The CPU sticks at 12% and the Xwayland process between 35% till 69%. I - I can stil use the interface. - Mouse respons very quickly.
I have installed Fedora 29 with libreoffice 6.1.2.1 and everything working well. The load is spread about all cores and the editing the presentation is working well.
Please You can close this bug
that's great news, wish I knew what made the difference