(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
(In reply to Wayne Mery (:wsmwk) from comment #50)
> (In reply to Adi from comment #49)
> > slow:
> > https://share.firefox.dev/3PZLCbH
>
> activity in nsIAbDirectory.cardForEmailAddress ?
> Also, are you using the cardbook addon? Problem reproduces without it?
I owe you a beer :-)
Disabling c
After another minor version upgrade, it was fast again. Upon switching
to a new folder, it became slow, and remained slow.
I managed to capture 2 profiles, where you can see fast vs slow, same
instance of Thunderbird, only difference is having switched to another
mail folder then back to the origi
(In reply to Adi from comment #46)
> Version 102.12.0 seems to have fixed the issue on my setup (Debian 11.7,
> Xfce, AMD Ryzen 4750u with integrated graphics in a Thinkpad T14 AMD Gen 1).
> The message list highlighting is just as responsive as the folder list now.
> It still uses quite a bit o
Version 102.12.0 seems to have fixed the issue on my setup (Debian 11.7,
Xfce, AMD Ryzen 4750u with integrated graphics in a Thinkpad T14 AMD Gen
1). The message list highlighting is just as responsive as the folder
list now. It still uses quite a bit of CPU when moving the mouse over
the list, how
(In reply to Sören Hentzschel from comment #31)
> > which has removed the possibility of disabling webrender
>
> I assume you already tried the newest graphics drivers.
>
> Why would you want to *completely * disable WebRender? Do hardware AND
> software WebRender crash for you? You can set gfx.
Debian 11 just upgraded to Thunderbird 102, which has removed the
possibility of disabling webrender, rendering Thunderbird on my computer
basically unusable. I was forced to downgrade to version 91.
high CPU usage and around 100ms delay on hover animations when moving
mouse over emails and menu i
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