Messages in this thread | | | Subject | Re: Hash functions (was Re: 2.2.6_andrea2.bz2) | From | (Harvey J. Stein) | Date | 07 May 1999 17:01:12 +0300 |
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Andrea Arcangeli <andrea@e-mind.com> writes:
> On Thu, 6 May 1999, Chuck Lever wrote: > > >that's one reason why you don't use the LSB of the multiplication result. > >instead, it is right-shifted so you get the middle bits, which are much > >more likely to be "random." > > BTW: 2**32*(sqrt(5)-1)/2 is 2654435770 and not 2654425957UL that you are > using in your hashfn. So were does 2654425957UL came from?
It's a nearby prime.
-- Harvey J. Stein BFM Financial Research hjstein@bfr.co.il
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