here is a slightly theoretical question. I saw an old post about dynamic sorting of portals, and one suggestion was to have multiple portals, each sorted on a different field, then dynamically view the one you want.
So the question is, when a layout open its downloads all records in an imbedded portal. If there are more than one portal based on the same table, will it download all the record one time for each portal, or just once for all the portals? So is there a performance penalty for having multiple portals based on the same field?