From: Charles Oliver Nutter <headius@...>
Date: 2009-09-03T14:20:25+09:00
Subject: Re: Confirm my Performance Test Against Java?

Worth noting again that for any long-running code or benchmarks,
you'll want to pass --server to use the optimizing JVM in JRuby. Much
faster.

On Wed, Aug 19, 2009 at 9:36 PM, <brabuhr@gmail.com> wrote:
> 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
>
> :-)
>
>