Andres Freund <andres@anarazel.de> writes:
> When switching bitmapword and companions in bitmap.h to u64 and s64
> respectively I get an improvement up to 15% in queries with 16+ joins.
I find this *really* hard to believe, because I've never seen the bitmap
support operations show up noticeably at all in profiles. What sort of
queries are you testing?
regards, tom lane