bench.rb

require File.expand_path("../test/helper", __FILE__)
require "ffaker"

N = 10000

def transaction
  ActiveRecord::Base.transaction do
    yield

    raise ActiveRecord::Rollback
  end
end

class Array
  def rand
    self[Kernel.rand(length)]
  end
end

Book = Class.new ActiveRecord::Base

class Journalist < ActiveRecord::Base
  extend FriendlyId
  friendly_id :name, use: :slugged
end

class Manual < ActiveRecord::Base
  extend FriendlyId
  friendly_id :name, use: :history
end

class Restaurant < ActiveRecord::Base
  extend FriendlyId
  friendly_id :name, use: :finders
end

BOOKS = []
JOURNALISTS = []
MANUALS = []
RESTAURANTS = []

100.times do
  name = FFaker::Name.name
  BOOKS << (Book.create! name: name).id
  JOURNALISTS << (Journalist.create! name: name).friendly_id
  MANUALS << (Manual.create! name: name).friendly_id
  RESTAURANTS << (Restaurant.create! name: name).friendly_id
end

ActiveRecord::Base.connection.execute "UPDATE manuals SET slug = NULL"

Benchmark.bmbm do |x|
  x.report "find (without FriendlyId)" do
    N.times { Book.find BOOKS.rand }
  end

  x.report "find (in-table slug)" do
    N.times { Journalist.friendly.find JOURNALISTS.rand }
  end

  x.report "find (in-table slug; using finders module)" do
    N.times { Restaurant.find RESTAURANTS.rand }
  end

  x.report "find (external slug)" do
    N.times { Manual.friendly.find MANUALS.rand }
  end

  x.report "insert (without FriendlyId)" do
    N.times { transaction { Book.create name: FFaker::Name.name } }
  end

  x.report "insert (in-table-slug)" do
    N.times { transaction { Journalist.create name: FFaker::Name.name } }
  end

  x.report "insert (in-table-slug; using finders module)" do
    N.times { transaction { Restaurant.create name: FFaker::Name.name } }
  end

  x.report "insert (external slug)" do
    N.times { transaction { Manual.create name: FFaker::Name.name } }
  end
end