First string character comparison benchmark

comparison.rb

require 'benchmark'

name = 'my_cool_string'

Benchmark.bmbm(10) do |x|
  x.report('name[0] hit') do
    1_000_000.times { name[0] == 'm' }
  end
  x.report('name[0] miss') do
    1_000_000.times { name[0] == 'y' }
  end
  x.report('name.start_with? hit') do
    1_000_000.times { name.start_with?('m') }
  end
  x.report('name.start_with? miss') do
    1_000_000.times { name.start_with?('y') }
  end
  x.report('name.match hit') do
    1_000_000.times { name.match(/^m/) }
  end
  x.report('name.match miss') do
    1_000_000.times { name.match(/^y/) }
  end
  x.report('name =~ hit') do
    1_000_000.times { name =~ /^m/ }
  end
  x.report('name =~ miss') do
    1_000_000.times { name =~ /^y/ }
  end
end

machine_specs.txt

MacBook Pro 15'', Mid 2010
2.66 GHz Intel Core i7
8 GB 1067 MHz DDR3

ruby 1.9.3p327.txt

ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-darwin12.2.0]

Rehearsal ---------------------------------------------------------
name[0] hit             0.980000   0.010000   0.990000 (  0.983280)
name[0] miss            1.050000   0.000000   1.050000 (  1.054768)
name.start_with? hit    0.600000   0.000000   0.600000 (  0.624704)
name.start_with? miss   0.560000   0.000000   0.560000 (  0.556793)
name.match hit          2.380000   0.020000   2.400000 (  2.408706)
name.match miss         0.610000   0.000000   0.610000 (  0.611798)
name =~ hit             0.630000   0.000000   0.630000 (  0.637947)
name =~ miss            0.470000   0.010000   0.480000 (  0.466624)
------------------------------------------------ total: 7.320000sec

                            user     system      total        real
name[0] hit             0.960000   0.000000   0.960000 (  0.957911)
name[0] miss            0.920000   0.000000   0.920000 (  0.919704)
name.start_with? hit    0.530000   0.000000   0.530000 (  0.539560)
name.start_with? miss   0.540000   0.000000   0.540000 (  0.545029)
name.match hit          2.220000   0.020000   2.240000 (  2.241739)
name.match miss         0.680000   0.000000   0.680000 (  0.687998)
name =~ hit             0.660000   0.000000   0.660000 (  0.669767)
name =~ miss            0.510000   0.000000   0.510000 (  0.508524)

ruby2.0.0p247.txt

ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.3.0]

Rehearsal ---------------------------------------------------------
name[0] hit             1.140000   0.010000   1.150000 (  1.143242)
name[0] miss            1.130000   0.000000   1.130000 (  1.132830)
name.start_with? hit    0.590000   0.000000   0.590000 (  0.599413)
name.start_with? miss   0.610000   0.000000   0.610000 (  0.612994)
name.match hit          2.720000   0.040000   2.760000 (  2.770379)
name.match miss         0.900000   0.000000   0.900000 (  0.899769)
name =~ hit             0.830000   0.000000   0.830000 (  0.840448)
name =~ miss            0.720000   0.000000   0.720000 (  0.736234)
------------------------------------------------ total: 8.690000sec

                            user     system      total        real
name[0] hit             1.090000   0.000000   1.090000 (  1.098711)
name[0] miss            1.110000   0.010000   1.120000 (  1.115329)
name.start_with? hit    0.590000   0.000000   0.590000 (  0.598362)
name.start_with? miss   0.590000   0.000000   0.590000 (  0.590486)
name.match hit          2.460000   0.020000   2.480000 (  2.486387)
name.match miss         0.880000   0.000000   0.880000 (  0.878244)
name =~ hit             1.000000   0.010000   1.010000 (  1.023415)
name =~ miss            0.710000   0.000000   0.710000 (  0.748270)