Benchmark #options_for_select from form_options_helper.rb

gistfile1.rb

require 'benchmark'

def check?(a, value)
  Array(a).include? value
end

a = (1..100).to_a
value = 500
disabled = true
html_attributes = {}
TIMES = 500_000
Benchmark.bmbm do |b|
  b.report('old') do
    TIMES.times do
      html_attributes[:selected] = check?(a, value)
      html_attributes[:disabled] = disabled && check?(a, value)
    end
  end

  b.report('new') do
    TIMES.times do
      html_attributes[:selected] = check?(a, value)
      html_attributes[:disabled] = disabled && html_attributes[:selected]
    end
  end
end


Output:
Rehearsal ---------------------------------------
old   4.050000   0.000000   4.050000 (  4.045806)
new   2.090000   0.000000   2.090000 (  2.093466)
------------------------------ total: 6.140000sec

          user     system      total        real
old   4.070000   0.000000   4.070000 (  4.064235)
new   2.090000   0.000000   2.090000 (  2.087229)