validates_timeliness/benchmark.rb

require 'date'
require 'parsedate'
require 'benchmark'
require 'rubygems'
require 'rails/version'
require 'active_support'
require 'active_record'
require 'action_controller'
require 'action_view'
$: << 'lib'
require 'lib/validates_timeliness'

n = 10000
Benchmark.bm do |x|
  x.report('time') { 
    n.times do
      "2000-01-04 12:12:12" =~ /\A(\d{4})-(\d{2})-(\d{2}) (\d{2})[\. :](\d{2})([\. :](\d{2}))?\Z/
      Time.mktime($1, $2, $3, $3, $5, $6)      
    end
  }
  
  x.report('parsedate') { 
    n.times do
      arr = ParseDate.parsedate("2000-01-04 12:12:12")
      Date.new(*arr[0..2])
      Time.mktime(*arr)
    end 
  }

  x.report('timeliness') { 
    n.times do
      ActiveRecord::Base.timeliness_date_time_parse("2000-01-04 12:12:12", :datetime)
    end 
  }
  
  x.report('datetime') { 
    n.times do
      DateTime.strptime("2000-01-04 12:12:12", '%Y-%m-%d %H:%M:%s')
    end 
  }
end