(In reply to Wayne Mery (:wsmwk) from comment #55) > The automation of https://mozilla.github.io/mozregression/quickstart.html > will make the job much easier
This helped, thank you! I was able to narrow it down a bit further to ``` 48:20.61 INFO: Last good revision: 036520a38d2b3d46fb31cf93f89d3545242feac5 (2021-01-27) 48:20.61 INFO: First bad revision: 0f4f1c5ca5d305dd600f759c69737e43478e6777 (2021-01-28) ``` So some commit in between 2021-01-27 and 2021-01-28 in the codebase of firefox or thunderbird is causing the issue. However *mozregression* then does not find any builds in between and stops with ``` 48:27.72 INFO: There are no build artifacts for these changesets (they are probably too old). ``` Now for the Firefox code base, that means **399** revisions and for Thunderbird **20**. 😮💨 Any suggestions how to tackle this further? -- 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
