Quickest way to filter cards with empty fields


reading the manual I read that front:_* (at least one char long) is used for filtering cards with empty front field. I usually use -front: (non-empty field) for that purpose. My question is what is better in terms of performance?

If that makes a difference would be nice to know, as sometimes I do filter +100K cards.

Best way to know is to time both of them - you can do so accurately by making a small add-on that uses col.find_cards() and checks time.time() before and after.

Ok, I’ll try that.