(In reply to Adi from comment #32) > ... > It seems that the high CPU usage and slow UI update is worse when the message > list is big and the window is big. If I make it that only 10 rows are > visible, it seems to be faster. Here is a profile of the mouse moving around > a large message list. https://share.firefox.dev/3y3PfU2
According to experts in matrix chat, "https://share.firefox.dev/3UR69z3 (profile from comment 32, we don't have symbols so I collapsed libxul.so). The profile from comment 29 has symbols, so we can see a bit more what happens: https://share.firefox.dev/3y7gOMy Both profiles show too much time drawing SVG images (and too many Image Paint markers for these images). The profile from comment 32 additionally has an insane amount of time spent doing an SQL query from getCardFromProperty. From looking at the profiles, it's not obvious to me if the SVG images are repeated too many times because of a Thunderbird bug, or if they are painted too many times due to a graphics bug." -- 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 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. 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 : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
