I tried to narrow this down a bit and made tests with several versions including beta releases. For me the problem starts when switching from
**88.0b3** (snappy, fast) to **89.0b1** (slow, high cpu usage) I was trying to build a version for all the commits (revisions in mecurial?) in between to narrow it down further but was only successful for the latest 115 version so far. I'll keep trying, though. If someone could confirm, that the "laggyness" was introduced in between those versions, this would already be quite helpful. Archived releases can be found here: https://archive.mozilla.org/pub/thunderbird/releases/ And if someone is more familiar with building Thunderbird and mercurial (hg) version control, maybe he/she can help out building the revisions in between those releases? -- 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 : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
