From: Charles Oliver Nutter <charles.nutter@...>
Date: 2008-01-11T02:11:05+09:00
Subject: Re: [ANN] JRuby 1.1 RC 1 Released

Sander Land wrote:
> The benchmark depends on a ~1500 line library. I can send you an email
> when I have the next release (in a few days), but I'm not sure if
> digging through the library would be an effective use of your time.
> The benchmark show that JRuby is a little slower, independent of the
> specific selection, crossover or mutation algorithm used. The only
> thing in the inner loop that all of these algorithms have in common
> are the fitness evaluations.

Yeah please do send an email then. I'd like to profile a bit and see if 
there's some bottleneck you're hitting in JRuby.

> This script takes just the fitness evaluations, and it does seem the
> problem is in this code:

I'll have a look. On my system with Ruby compiled -O2 JRuby's equal or a 
little faster, but that's  a bit disappointing.

> I also ran one of my other benchmarks (a function optimization test)
> which uses the same library.
> 1.8 compiled : 81.39
> 1.9 compiled : 43.79
> JRuby -C: 95.28
> JRuby +C: 63.98

That's more the performance I'd expect to see.

- Charlie