I found the reason for the filters being much slower than they should be, so building the index should be much faster with v2.21.1 when filters are enabled. Searching with filters enabled will probably still have a noticable impact though, but that is really nothing I can change, unless I allow filters with 0 matches into the results.
So I guess QuickSearch should be usable for you again, albeit without the filter functionality. So I hope I can finally consider this issue resolved.
So I guess QuickSearch should be usable for you again, albeit without the filter functionality. So I hope I can finally consider this issue resolved.