Re: Simple hash or pseudo-random function

[Paul Rubin <no.email@nospam.invalid>]

gautier_niouzes@hotmail.com writes:
> The difficulty for me is to find a very simple function. There are
> many that are for hashing strings, but they could be too
> time-consuming: it's for a number-crunching program where this
> function will be called billions of times, so I'm looking for
> something really simple (and fast :-) ).

String-hashing functions can be very fast, and if you're -really- all
out for speed, there might be machine intrinsics that you could use.
Also you can take the exact characteristics of the input and output
into account when optimizing.

From your description "not uniformily distributed (it's a code with some
meaning)", this may be of interest:

https://en.wikipedia.org/wiki/Zobrist_hashing