[Bug 1959747]

[adibadi]

(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 cardbook add-on has resolved my lagging message list. It's not
perfect, but it's fast now. If I toggle the message pane with f8, make
the window really wide, it's still laggy, but I never use Thunderbird
this way, and the lag is nothing compared to the lag I had with cardbook
enabled.

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https://bugs.launchpad.net/bugs/1959747

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

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