Profile testing options_for_select

profile_options_for_select.rb

require 'rubygems'
require 'thread'
require 'rails/all'
require 'benchmark'

include ActionView::Helpers::FormOptionsHelper

puts "Using #{`ruby -v`}"

@choices = 700.times.collect { [(0...50).map{ ('a'..'z').to_a[rand(26)] }.join, rand(10000)] }

module ActionView::Helpers::FormOptionsHelper
  def faster_options_for_select(container, selected = nil)
    return container if String === container

    selected, disabled = extract_selected_and_disabled(selected).map do | r |
      Array.wrap(r).map {|e| e.to_s}
    end

    container.map do |element|
      html_attributes = option_html_attributes(element)
      text, value = option_text_and_value(element).map {|e| e.to_s}
      selected_attribute = ' selected="selected"' if option_value_selected?(value, selected)
      disabled_attribute = ' disabled="disabled"' if disabled && option_value_selected?(value, disabled)
      %(<option value="#{ERB::Util.html_escape(value)}"#{selected_attribute}#{disabled_attribute}#{html_attributes}>#{ERB::Util.html_escape(text)}</option>)
    end.join("\n").html_safe

  end
end

COUNT = 100
Benchmark.bmbm do |test|
  test.report('Using Symbol#to_proc') do
    COUNT.times do
      options_for_select(@choices)
    end
  end
  test.report('Standard call') do
    COUNT.times do
      faster_options_for_select(@choices)
    end
  end
end

results.txt

Using ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10.7.0], MBARI 0x6770, 
Ruby Enterprise Edition 2011.03

Rehearsal --------------------------------------------------------
Using Symbol#to_proc   3.520000   0.060000   3.580000 (  3.594295)
Standard call          2.890000   0.020000   2.910000 (  3.038064)
----------------------------------------------- total: 6.490000sec

                           user     system      total        real
Using Symbol#to_proc   3.750000   0.060000   3.810000 (  3.856077)
Standard call          2.690000   0.010000   2.700000 (  2.713586)