Am Dienstag, den 14.06.2005, 02:40 -0400 schrieb Greg Stark:
> Shelby Cain <alyandon(at)yahoo(dot)com> writes:
>
> > > My question is: is the builtin MD5 appropriate for this use or should I be
> > > using a function from pl/something? Figures on collision rates would be
> > > nice as well - the typical chunk of text is probably 1k-8k.
>
> Note that MD5 is slow and CPU-intensive. By design.
>
> If you want a quick way to find matching records then you might find something
> like CRC to be more useful. With MD5 it's supposed to be hard for someone to
> come up with inputs that hash to a target value, but if you're not too worried
> about people trying to do that then MD5 is probably overkill.
>
Sha1 is said to be faster.
(And less likely to collisions)
--
Tino Wildenhain <tino(at)wildenhain(dot)de>