From: brabuhr@...
Date: 2009-08-20T11:36:35+09:00
Subject: Re: Confirm my Performance Test Against Java?

On Wed, Aug 19, 2009 at 5:05 PM, Charles Oliver
Nutter<headius@headius.com> wrote:
> On Wed, Aug 19, 2009 at 8:31 AM, Ben
> Christensen<benjchristensen@gmail.com> wrote:
>> I've started down a path of doing various performance tests to see what
>> kind of impact will occur by using Ruby and in my first test the numbers
>> are very poor - so poor that I have to question if I'm doing something
>> wrong.
>
> 1.8.6 is pretty slow, compared to other impls. Ruby 1.9 and JRuby will
> perform better, as shown by a few folks. JRuby on a Java 6 JVM with
> --fast and --server should perform very well.

And, of course JRuby adds other possibilities:

$ java FileReadParse
Starting to read file...
The number of tokens is: 234937
It took 2098 ms

$ java FileReadParse
Starting to read file...
The number of tokens is: 234937
It took 788 ms

$ ruby -v file_read_parse.rb
ruby 1.8.2 (2004-12-25) [powerpc-darwin8.0]
Starting to read file ...
The number of tokens is: 234937
It took 2666.646 ms

$ jruby -v file_read_parse.rb
jruby 1.3.1 (ruby 1.8.6p287) (2009-06-15 2fd6c3d) (Java HotSpot(TM)
Client VM 1.5.0_16) [ppc-java]
Starting to read file ...
The number of tokens is: 234937
It took 3120.0 ms

$ jruby --fast --server -v file_read_parse.rb
jruby 1.3.1 (ruby 1.8.6p287) (2009-06-15 2fd6c3d) (Java HotSpot(TM)
Client VM 1.5.0_16) [ppc-java]
Starting to read file ...
The number of tokens is: 234937
It took 2809.0 ms

$ jruby -v file_read_parse-2.rb
jruby 1.3.1 (ruby 1.8.6p287) (2009-06-15 2fd6c3d) (Java HotSpot(TM)
Client VM 1.5.0_16) [ppc-java]
Starting to read file...
The number of tokens is: 234937
It took 593 ms

$ java FileReadParse
Starting to read file...
The number of tokens is: 234937
It took 588 ms

$ jruby -v file_read_parse-2.rb
jruby 1.3.1 (ruby 1.8.6p287) (2009-06-15 2fd6c3d) (Java HotSpot(TM)
Client VM 1.5.0_16) [ppc-java]
Starting to read file...
The number of tokens is: 234937
It took 595 ms

$ cat file_read_parse-2.rb
require 'java'
java_import 'FileReadParse'

FileReadParse.new.do_stuff

:-)