From: Steve Chan <sychan168@...>
Date: 2008-01-11T10:10:03+09:00
Subject: Re: JRuby 1.1 RC 1 Released


   Thanks for getting this release out - I've been tracking progress
on the blogs and mailing lists and was really looking forward to
seeing the results. Just to add another datapoint, here are some
timings for how jruby performs on a script that I run fairly
regularly. Its a REXML stream parser that parses the output from a
network scanning tool, and outputs any differences noted in security
issues identified by the the scanner. Its a script used for real work,
and not a synthetic benchmark.
   For these runs, I ran each configuration 5 times on a fairly
quiescent CentOS machine, and averaged the results. The files that
were diffed were added up to almost 19MB total. The Ruby build is a
little older (1.8.4) and the Java VM is relatively recent ( 1.6.0_02)

Time        Version
2m18.463s   Ruby 1.8.4
3m45.140s   JRuby 1.1RC1
2m40.635s   JRuby 1.1RC1 -J-server
2m50.922s   JRuby 1.1RC1 -J-server +C
2m36.970s   JRuby 1.1RC1 -J-server -J-Djruby.compile.frameless=true
2m33.344s   JRuby 1.1RC1 -J-server -J-Djruby.compile.frameless=true -J-
Djruby.compile.boxed=true

   The difference in times between the last 2 runs is small enough to
be within the margin or error for these sorts of things. It is pretty
close to the speed of the 1.8.4 Ruby interpreter, but not quite there
- it would probably be competitive maybe even a little faster if the
JVM startup and code compilation overhead were amortized over a much
longer run.

   Steve