Re: Thunderbird Performance with Large Calendars

On 17.10.2016 22:52, kfr- wrote:
> We are seeing poor performance when a user adds a number of
> calendars.
>
> We are using ical.js.
>
> Thunderbird can take 5+ minutes to load and seems bogged down after
> all the calendars are loaded.
>
> Do you have any suggestions on what to look at specifically?

The experimental icaljs library has known performance regressions
compared to the default libical library. You could test with default 
libical library enabled.

Next thing could be to check the various filter settings in today pane, 
calendar tab and task tab. If e.g. the search bar is set to 'show all 
events' than more work has to be done compared to when 'show events for 
this month' is selected.

When using remote calendars you could test if enabling or disabling the 
calendar cache provides a performance difference.

/Stefan