Transitions is using raw data to generate its reports.

This is known to be slow on some high traffic installations see https://matomo.org/faq/how-to/faq_161/

Similar to unique visitors (see https://matomo.org/faq/how-to/faq_113/ ) we would also want a config setting to disable Transitions for specific periods.

Ideally this was configurable additionally per site as it can be useful when there are many lower traffic sites in there and only one or few high traffic sites like

[Transitions] ; applies to all sites
setting_name=...
[Transitions_61] ; applies only to site 61
setting_name=...

We would want to configure whether it's enabled for year, month, week, or day. If a range is selected and it's bigger than the not allowed period, then it should not work on that range. If only month|week|day is allowed, then any range selecting more than 31 days wouldn't be possible. Maybe we allow to configure the max period like

max_period_allowed=any|year|month|week|day

Just a quick thought and naming could be likely improved. I guess once you allow month, it should also automatically allow week and day.

• When the feature is disabled for a period, it should ideally not be shown in a row action.
• When the feature is disabled for a period, then the Transitions report should say something like "This feature is not available for this period, try selecting a period with less ..." and not even try to load any data.