I did read this thread about FARR not indexing - but that's why I pointed out here, that indexing can be extremely fast! As far as I understood, FARR doesn't index due to performance issues, but as "Everything" shows, indexing can be extremely fast!
Did you take a look at "Everything"? If not, I strongly suggest it, because it's absolutely amazing how fast this program is! I don't see why the same technique could not be used in FARR...
Regards!