(In reply to Frank from comment #52) > In my case, I have no add-ons installed and tested with an clean profile. > Compared to Thunderbird 91 the UI is laggy and uses about a factor 2 more CPU > when hovering over the entries in the message pane.
indeed, CPU usage is high and it's not as snappy as with version 91, but it's much better than I was experiencing, where UI would take about 250ms to update because of the cardbook addon. I still hope it gets fixed properly. Also, it's not only the messages pane which is laggy. If you stretch the folders pane to be really wide, that one is laggy as well. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1959747 Title: [upstream] Very high CPU and slow responsiveness in Thunderbird 91-102 Status in Mozilla Thunderbird: Confirmed Status in thunderbird package in Ubuntu: Triaged Bug description: Very high CPU and slow responsiveness in Thunderbird 91.5.0 and later. Just moving the mouse cursor over a message list results in 365% CPU for me. I had to set this in the config editor to fix it: gfx.webrender.force-disabled = TRUE Upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1730423 To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1959747/+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
