From: Charles Oliver Nutter <headius@...>
Date: 2012-02-15T17:57:02+09:00
Subject: Re: Basic Ruby performance

On Fri, Feb 3, 2012 at 12:56 PM, Dmitry Nikiforov <dniq@dniq-online.com> wrote:
> jruby is just as slow as regular ruby 1.9.3.

I cannot reproduce. Post your jruby -v...I suspect it's running with
the non-optimizing JVM mode.

This is JRuby master + Java 7, which is the fastest of all Ruby impls
I have installed:

system ~/projects/jruby $ jruby -rbenchmark -e "3.times { puts
Benchmark.measure { for a in 0..1E8; a * 2; end } }"
  8.945000   0.000000   8.945000 (  8.945000)
  8.405000   0.000000   8.405000 (  8.405000)
  8.341000   0.000000   8.341000 (  8.341000)

system ~/projects/jruby $ rvm 1.9.3 do ruby -rbenchmark -e "3.times {
puts Benchmark.measure { for a in 0..1E8; a * 2; end } }"
 17.540000   0.000000  17.540000 ( 17.552517)
 17.440000   0.010000  17.450000 ( 17.440687)
 17.490000   0.000000  17.490000 ( 17.498955)

system ~/projects/jruby $ macruby -rbenchmark -e "3.times { puts
Benchmark.measure { for a in 0..1E8; a * 2; end } }" 15.800000
0.010000  15.810000 ( 15.803463)
 15.750000   0.000000  15.750000 ( 15.751863)
 15.850000   0.000000  15.850000 ( 15.860579)

system ~/projects/jruby $ ../rubinius/bin/rbx -rbenchmark -e "3.times
{ puts Benchmark.measure { for a in 0..1E8; a * 2; end } }"
 11.190136   0.002077  11.192213 ( 11.193023)
 11.087971   0.003063  11.091034 ( 11.091239)
  7.020758   0.001578   7.022336 (  7.022235)

It's a pretty meaningless benchmark, though.

- Charlie