Speed Issues... Sometimes takes 60 seconds to load repeating group

[fayewatson]

For anyone experiencing the same thing, try using “Do A Search For” for the data source (when possible), instead of using :filtered on a list. That should help.

Difference between datasource criteria vs datasource filtering

The search is more efficient as the selection is in the database, on the server, while the filtering is done on the page. So you have more options, but all the data needs to be loaded which can be quite slow. The rule being: always always use searches when you can, and use filters when you really need it and cannot use a search.