From: Charles Oliver Nutter <headius@...>
Date: 2012-05-19T21:50:53+09:00
Subject: Re: break down of differences between interpreters?

On Sun, May 6, 2012 at 6:39 AM, Peter Hickman
<peterhickman386@googlemail.com> wrote:
> Why don't we use it everywhere?
>
> 1) We dont want to heft around the massive JRE

I'd hardly call it hefty... a typical JRE download is from 10 to 30MB.

> Even if Jruby was consistently twice as fast as the normal interpreter
> it will only amount to a < 10% improvement in the overall application
> performance for the sort of apps we create.
>
> The biggest improvements in performance for our applications come from
> better algorithms and caching :)

Probably the best argument for simply writing good Ruby code rather
than hoping for an implementation to solve all your problems, eh? :)

FWIW, JRuby 1.7 on Java 7 JVMs will start to show significantly
improved performance...on some real-world benchmarks I've tested
things are anywhere from 2-10x faster. Of course, that will maybe
amount to an 18% improvement in your overall app performance, but that
might be desirable too...

- Charlie