make faster Richards benchmark

[Josef Meile]

Duncan Lissett wrote:
> I'd appreciate any suggestions on how to make faster Python
> implementations of Richards benchmark. Perhaps there are obvious
> problems that can be corrected?
> 
> http://www.lissett.com/ben/bench1.htm
What's about including a second python implementation of the Richards 
benchmark using psyco? You don't have to modify your code, you only have 
to add two lines. It would be also interesting to see the differences 
between both source codes.

Regards,
Josef