rr42_create_obj_with_serialized_perf

rr42_create_obj_with_serialized_perf.rb

unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'rails', '4.1.8'
    #gem 'rails', '4.2.0.rc3'
    gem 'sqlite3'
    gem 'pg'
    gem 'byebug'
  GEMFILE

  system 'bundle'
end

require 'bundler'
Bundler.setup(:default)

require 'active_record'
require 'minitest/autorun'
require 'logger'
require 'byebug'

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
 create_table "dummy_items", force: true do |t|
   t.string :data1
   t.string :data2
   t.string :data3
   t.string :data4
   t.integer :num
 end
end

class DummyItem < ActiveRecord::Base
  serialize :data1, Array
  serialize :data2, Array
  serialize :data3, Array
  serialize :data4, Array

  after_initialize :init

  def init
    self.num = 42
  end
end

class PerfTest < Minitest::Test
  def test_initialize
    puts Benchmark.measure { 3000.times { DummyItem.new } }
  end
end