gistfile1.rb

#!/usr/bin/env ruby -wKU
puts RUBY_DESCRIPTION

$:.unshift File.expand_path("../lib", File.dirname(__FILE__))

require 'i18n'
require 'benchmark'
require 'yaml'

str = "This is a custom blank message for {{model}}: {{attribute}}"
str19 = "This is a custom blank message for %{model}: %{attribute}"

I18n::Backend::InterpolationCompiler::Compiler.compile_if_an_interpolation(str)

keys = {:model => 'MODEL', :attribute => 'ATTRIBUTE'}

TESTS = (ARGV.shift || 5_000_000).to_i
Benchmark.bmbm do |results|
  results.report('compiler') do
    TESTS.times { str.i18n_interpolate(keys) }
  end
  
  results.report('1.9') do
    TESTS.times { str19 % keys }
  end
end

result

ruby 1.9.2dev (2010-04-27 trunk 27512) [x86_64-darwin10.2.0]
Rehearsal --------------------------------------------
compiler   6.710000   0.040000   6.750000 (  6.775250)
1.9        7.340000   0.100000   7.440000 (  7.471159)
---------------------------------- total: 14.190000sec

               user     system      total        real
compiler   6.690000   0.020000   6.710000 (  6.718618)
1.9        7.350000   0.110000   7.460000 (  7.513237)

ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0], MBARI 0x6770, Ruby Enterprise Edition 2009.10
Rehearsal --------------------------------------------
compiler   6.620000   0.080000   6.700000 (  6.776867)
1.9       38.540000   0.030000  38.570000 ( 38.771854)
---------------------------------- total: 45.270000sec

               user     system      total        real
compiler   6.650000   0.090000   6.740000 (  6.866077)
1.9       38.680000   0.060000  38.740000 ( 39.019099)

jruby 1.5.0.RC1 (ruby 1.8.7 patchlevel 249) (2010-04-14 0b08bc7) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_17) [x86_64-java]
Rehearsal --------------------------------------------
compiler   2.733000   0.000000   2.733000 (  2.637000)
1.9       15.262000   0.000000  15.262000 ( 15.262000)
---------------------------------- total: 17.995000sec

               user     system      total        real
compiler   2.721000   0.000000   2.721000 (  2.721000)
1.9       15.819000   0.000000  15.819000 ( 15.819000)

rubinius 1.0.0-rc4 (1.8.7 release 2010-03-31 JI) [x86_64-apple-darwin10.2.0]
Rehearsal --------------------------------------------
compiler   4.835470   0.000000   4.835470 (  4.835480)
1.9       66.769281   0.000000  66.769281 ( 66.769300)
---------------------------------- total: 71.604751sec

               user     system      total        real
compiler   4.444365   0.000000   4.444365 (  4.444395)
1.9       65.180435   0.000000  65.180435 ( 65.180447)