.rvmrc

rvm use --create 1.9.2@list_benchmark

list_benchmark.rb

numbers = ARGV.map(&:to_i)

require 'active_record'
require 'ranked-model'
require '../acts_as_list/init' # from github.com/vpereira/acts_as_list
require 'resort'
require 'benchmark'
require 'sqlite3'
require 'logger'

ActiveRecord::Base.establish_connection(
  :adapter => 'sqlite3',
  :database => ':memory:'
)

ActiveRecord::Schema.define do
  create_table :articles do |t|
    t.string     :name

    t.boolean :first
    t.references :next

    t.timestamps
  end

  add_index :articles, :next_id
  add_index :articles, :first

  create_table :ducks do |t|
    t.string     :name
    t.integer :row_order
    t.timestamps
  end

  add_index :ducks, :row_order

  create_table :list_items do |t|
    t.string     :name
    t.integer :position
    t.timestamps
  end

  add_index :list_items, :position
end

ActiveRecord::Base.logger = Logger.new('benchmark.log')

class Duck < ActiveRecord::Base
  include RankedModel
  ranks :row_order
end

class Article < ActiveRecord::Base
  resort!
end

class ListItem < ActiveRecord::Base
  acts_as_list
  scope(:ordered, lambda{
    order(ListItem.arel_table[:position])
  })
end

unless numbers.empty?
  numbers.each do |number|

    iterations = (number).to_i

    puts "\n\nResort with #{number} elements"
    Benchmark.bm(20) do |x|
      x.report("Create:")   {iterations.times { |i| Article.create(:name => "Article #{i}")}}
      x.report("Order:")   { Article.ordered }
      x.report("Prepend:")   { iterations.times { Article.last.prepend } }
      x.report("Append after:")   { iterations.times { Article.last.append_to(Article.first) } }
      x.report("Destroy:")   { Article.all.each {|article| article.destroy } }
    end

    puts "\n\nRankedModel with #{number} elements"
    Benchmark.bm(20) do |x|
      x.report("Create:")   {iterations.times { |i| Duck.create(:name => "Duck #{i}")}}
      x.report("Order:")   { Duck.rank(:row_order).all }
      x.report("Prepend:")   { iterations.times { Duck.last.update_attribute(:row_order_position, :first) } }
      x.report("Append after:")   { iterations.times { Duck.last.update_attribute(:row_order_position, Duck.first.row_order + 1)} }
      x.report("Destroy:")   { Duck.all.each {|duck| duck.destroy } }
    end

    puts "\n\nActsAsList with #{number} elements"
    Benchmark.bm(20) do |x|
      x.report("Create:")   {iterations.times { |i| ListItem.create(:name => "ListItem #{i}")}}
      x.report("Order:")   { ListItem.ordered.all }
      x.report("Prepend:")   { iterations.times { ListItem.last.move_to_top } }
      x.report("Append after:")   { iterations.times { ListItem.last.insert_at(ListItem.first.position + 1)} }
      x.report("Destroy:")   { ListItem.all.each {|item| item.destroy } }
    end

    Duck.destroy_all
    Article.destroy_all
    ListItem.destroy_all
  end
end