benchmark

gistfile1.txt

#!/usr/bin/env ruby
require 'benchmark'
AMOUNT_CALC_ATTRIBUTES = [:quantity, :price_per, :subtotal, :service_fee, :total, :trans_fee]

class AmountCalculated
  attr_accessor *AMOUNT_CALC_ATTRIBUTES
  attr_accessor :currency

    def initialize(opts)
      opts.each{|k,v| self.send("#{k}=", v)}
    end

    def <<(_other_class)
      raise "different currencies can not be summed" unless _other_class.currency == self.currency

      AMOUNT_CALC_ATTRIBUTES.each{|k|  self.send("#{k}=", self.send("#{k}") +  _other_class.send("#{k}" )    ) }
    end

    def +(_other_class)
      raise "different currencies can not be summed" unless _other_class.currency == self.currency


      new_values = {'currency' => self.currency}
      AMOUNT_CALC_ATTRIBUTES.each{|k| new_values["#{k}"] =  self.send("#{k}") + _other_class.send("#{k}" ) }
      AmountCalculated.new(new_values)
    end
end



am = AmountCalculated.new({ :quantity => rand(10), :price_per => rand(10), :subtotal => rand(10), :service_fee => rand(10), :trans_fee => rand(10), :total => rand(10), :currency => 'USD' })


Benchmark.bm do|b|
  b.report('+') do
    1_000_00.times do


      am2 = AmountCalculated.new({ :quantity => rand(10), :price_per => rand(10), :subtotal => rand(10), :service_fee => rand(10), :trans_fee => rand(10), :total => rand(10), :currency => 'USD' })

      am = am + am2
    end
  end

  b.report('<<') do
    1_000_00.times do

      am2 = AmountCalculated.new({ :quantity => rand(10), :price_per => rand(10), :subtotal => rand(10), :service_fee => rand(10), :trans_fee => rand(10), :total => rand(10), :currency => 'USD' })

      am << am2
    end
  end
end

   user     system      total        real

• 2.650000 0.000000 2.650000 ( 2.649692)

<< 1.860000 0.000000 1.860000 ( 1.864603)