Comment 88 for bug 1458593

(In reply to Ben Bucksch (:BenB) from comment #40)
> > After deactivation of Lightning everything runs fast.
>
> Note that the problem gets worse over time, so a restart alone can improve
> things temporarily.
> That said, Lightning does make the situation considerably worse.
> This issue needs urgent attention from the Lightning owners.
>
> Tip: Separate Lightning into its own process, by creating a second
> Thunderbird process, starting it with thunderbird.exe -new-instance -P
> <profilename>, and installing Lighting there, and ignoring the mail part,
> effectively creating a "Sunbird".

The combination of Thunderbird, Lightning and the Google Calendar Provider is very attractive, so it's a real pity that it is pretty much practically useless at present.

This suggestion is not a bad compromise, hiding the underlying issues enough to make the platform usable. Here is what I did:

1. Create a new profile (eg Calendar)
2. Launch Thunderbird with --new-instance -P Calendar
3. Install Lightning, Google Calendar Provider, and Lightbird
4. Restart with --new-instance -P Calendar -calendar for a calendar only user experience