Fast hash function

[Joppe Bos]

Hello all,

I was wondering if someone has ever written a (fast) hash function with 
GMP and wants to share it? From the manual I understand there are no such 
functions at this time standard within GMP.

A little bit off-topic: I am looking for a hash function which is as fast 
as possible (for a hashed bucket sort), so the hash function doesn't have 
to be secure. I have been experimenting with different functions and 
different implementations, untill now the MD4 algorithm from OpenSSL is 
the fastest. Does anyone here know of a good and fast (open source) crypto 
library besides OpenSSL and libgcrypt which implements hash functions? Or 
even better does someone know of a very fast (but insecure) hash 
algorithm?

Thanks for your time, with kind regards,

Joppe Bos