From: Charles Oliver Nutter <charles.nutter@...>
Date: 2006-10-26T13:48:51+09:00
Subject: Re: jruby <=> prime time?

Giles Bowkett wrote:
> I've got a project for which I might need to write a fast and very small 
> server.
> 
> I was initially thinking, that if I do in fact need to do this, that I
> would have to choose Python over Ruby for the server, because it would
> be faster.
> 
> however -- is JRuby fast enough for something like this?
> 
> (because it would definitely be cool if it was.)
> 

JRuby executing straight-up Ruby code is still a few times slower than 
normal Ruby. We're working on a few options to speed it up, but there's 
a bit of work to do. However when a Java library or external resource 
(IO, etc) is involved, however, we usually are comparable or faster. For 
example, a deep iterative fib starts winning in JRuby around the 
300000th fib because of Java's fast BigInteger class.

If you're doing mostly straight Java code and integrating it through a 
thin Ruby layer, it will likely be faster than writing the same service 
in pure Ruby...either on the C version or on JRuby.

-- 
Charles Oliver Nutter, JRuby Core Developer
headius@headius.com -- charles.nutter@sun.com
Blogging at headius.blogspot.com