At start-up, these two lists get filled with items. If the user doesn't look at the tasks tab or sets the Today Pane to a mode which displays tasks, this is a complete waste of time. If the user has a lot of tasks this is a waste of a lot of time. The lists should be filled only when first looked at. (They should also only get updated if they're visible, but that's a whole other thing and I'll be looking at it in bug 1763752.)

I think this one will be worth uplifting at the appropriate time.

Pushed by geoff@darktrojan.net:
https://hg.mozilla.org/comm-central/rev/37f92985c1cb
Avoid loading the task list and the Today Pane to-do list unless they are visible. r=aleca

Comment on attachment 9292590 [details]
Bug 1788549 - Avoid loading the task list and the Today Pane to-do list unless they are visible. r=#thunderbird-reviewers

[Approval Request Comment]
Regression caused by (bug #):
User impact if declined: slow
Testing completed (on c-c, etc.): 1 week on c-c
Risk to taking this patch (and alternatives if risky): low risk

Let's get this an extra week on beta. Still target 102.4.

Comment on attachment 9292590 [details]
Bug 1788549 - Avoid loading the task list and the Today Pane to-do list unless they are visible. r=#thunderbird-reviewers

[Triage Comment]
Approved for beta

Thunderbird 105.0b4:
https://hg.mozilla.org/releases/comm-beta/rev/28480e19aff0

Comment on attachment 9292590 [details]
Bug 1788549 - Avoid loading the task list and the Today Pane to-do list unless they are visible. r=#thunderbird-reviewers

[Approval Request Comment]
Regression caused by (bug #):
User impact if declined: slow
Testing completed (on c-c, etc.): in 105.0b4
Risk to taking this patch (and alternatives if risky): low risk

Comment on attachment 9292590 [details]
Bug 1788549 - Avoid loading the task list and the Today Pane to-do list unless they are visible. r=#thunderbird-reviewers

[Triage Comment]
Approved for esr102

Thunderbird 102.3.3:
https://hg.mozilla.org/releases/comm-esr102/rev/4f4054165b2a