Andrew Sullivan <andrew(at)libertyrms(dot)info> writes:
> ... In any case, I can't offer a definite
> answer about the 64-bit qsort for now.
Do you need to profile it? It seemed that the 32-bit behavior for
many-equal-keys was so bad that it'd be easy to tell whether it's
fixed, just by rough overall timing of a test case...
regards, tom lane