> 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.
I can confirm exactly this! Working on a 2 screen setup:
main screen: 3840x2160
secondary:2560x1440
Arch Linux, Swaywm. Usually all clients (windows) are maximized.
Thunderbird on the main screen has a very bad performance. It is everything
else than fun to work with.. :(
As soon as i move thunderbird to the second screen (or switch to floating an
make it smaller) the performance increases significantly.
It seems like only the email list is affected. Folder tree for example
is fine..
It's been a long time now and kinda renders thunderbird more or less
unusable for me. Is there anything I can do to get this fixed? Happy to
provide more information if needed!
Thanks for effort :)
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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
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