From: MikkelFJ <mikkelfj-anti-spam@...>
Date: 2002-12-02T01:23:20+09:00
Subject: Re: Numerical Ruby


"Masahiro TANAKA" <masa@ir.isas.ac.jp> wrote in message
news:20021201.192929.41625961.masa@ir.isas.ac.jp...

>     @Bz[1..-2,1..-2] +=  (dt/dy)*(@Ex[2..-1,1..-2] - @Ex[1..-2,1..-2])
>   end
>
> For 500x500 array, the result of benchmark on my machine is:
>
>   with loop:    8.69 sec
>   without loop: 0.31 sec


This is actually pretty cool - now how much code would you need in C to get
the same performance.

There is only one tiny small step from here to use the message passing
interface MPI and have parallel computations on computer grids - I think
there are few around which you can hook up to, although I've never tried it.


Mikkel