I would like to share our experience regarding slowness when dealing with a large number of fields and rows in a repeater.
We have a repeater with approximately 14 fields (including 1 media field) and 300 rows in a custom post type.
The saving process takes about 5 seconds.
However, if we enable revisions for our custom post type, the saving process takes 80 seconds. The reason is that revisions re-save all 300 rows in the database, triggering thousands of hooks as well. Instead of saving only the differences, as ACF does when revisions are disabled.
So, it’s something to consider if you’re experiencing slowness issues with a lot of data on your page!
David
