Andres Freund <[email protected]> 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

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