2xx.out

ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin14]
                         user     system      total        real
divide               0.070000   0.000000   0.070000 (  0.069306)
gtlt                 0.060000   0.000000   0.060000 (  0.059579)
range_include        0.140000   0.000000   0.140000 (  0.140579)
range_member         0.140000   0.000000   0.140000 (  0.139238)
string_start_with    0.320000   0.010000   0.330000 (  0.370943)
string_match         1.300000   0.020000   1.320000 (  1.358586)

2xx.rb

puts RUBY_DESCRIPTION

require 'benchmark'

n = (ARGV[0] || 1_000_000).to_i

Benchmark.bm(18) do |bm|
  bm.report :divide do
    n.times { 250 / 100 == 2 }
  end

  bm.report :gtlt do
    n.times { 250 >= 200 && 250 <= 299 }
  end

  bm.report :range_include do
    range = (200..299)
    n.times { range.include?(250) }
  end

  bm.report :range_member do
    range = (200..299)
    n.times { range.member?(250) }
  end

  bm.report :string_start_with do
    two = '2'.freeze
    n.times { 250.to_s.start_with?(two) }
  end

  bm.report :string_match do
    regex = /^2/
    n.times { regex.match(250.to_s) }
  end
end