[Bug 1959747]

[adibadi]

(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 as with version 91, but
it's much better than I was experiencing, where UI would take about
250ms to update because of the cardbook addon. I still hope it gets
fixed properly.

Also, it's not only the messages pane which is laggy. If you stretch the
folders pane to be really wide, that one is laggy as well.

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Title:
  [upstream] Very high CPU and slow responsiveness in Thunderbird 91-102

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