From: Charles Oliver Nutter <charles.nutter@...>
Date: 2008-01-09T10:19:40+09:00
Subject: Re: [ANN] JRuby 1.1 RC 1 Released

Charles Oliver Nutter wrote:
> Sander Land wrote:
>> With all the blog posts about JRuby being posted, I thought I would
>> finally try JRuby myself.
>> I tested it on my genetic algorithms library. Lots of metaprogramming
>> going on in the initialization, and a lot of calculations afterwards
>> using the generated modules and classes.
>>
>> First tried my tests.
>> Finished in 34.726 seconds.
>> 33 tests, 626 assertions, 0 failures, 0 errors
>> That's better than 1.9, which couldn't handle some of the 
>> metaprogramming.
>>
>> Then tried a benchmark:
>> 1.8  : 676.75 seconds  (ubuntu/apt-get)
>> 1.9  : 161.99 seconds  (svn/-O3/no enable-pthread)
>> JRuby: 302.23 seconds  (java opts -server, jruby +C)
>>
>> Did JRuby just outperform 1.8 by a factor >2 ?
>> I'm impressed. Great job JRuby team.
> 
> Wow, that's great to hear. There are a few experimental options you can 
> see running jruby --properties that might boost it further. They're not 
> all 100% safe, and may have side effects, but you can try them anyway 
> and see how the performance comes out.
> 
> Especially look at -J-Djruby.compile.frameless, which improves some 
> benchmarks by a factor of 3.

I realized that might confuse some...the full flag would be

-J-Djruby.compile.frameless=true

Fun stuff.

- Charlie