From: Olivier Saut <Olivier.Saut@...>
Date: 2002-12-02T18:50:41+09:00
Subject: Re: Numerical Ruby

On Sun, 01 Dec 2002, MikkelFJ <mikkelfj-anti-spam@bigfoot.com> wrote:

> 
> "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.

Yes. After a rewrite following Masahiro's suggestion, my code is 50
times faster!


			- Olivier