perf.rb

ENV['BUNDLE_GEMFILE'] = File.expand_path('../../rails/Gemfile', __FILE__)
require_relative '../rails/load_paths'
require 'active_record'
require 'active_support/all'

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

ActiveRecord::Schema.define do
  create_table :users, force: true do |t|
    t.string :attribute1
    t.string :attribute2
    t.string :attribute3
    t.string :attribute4
    t.string :attribute5
    t.string :attribute6
    t.string :attribute7
  end
end

class User < ActiveRecord::Base; end

# insert 1000 records via seeds
1000.times do
  User.create! attribute1: 'foo', attribute2: 'foo', attribute3: 'foo', attribute4: 'foo', attribute5: 'foo', attribute6: 'foo', attribute7: 'foo'
end

require 'benchmark/ips'

puts ActiveRecord.version
puts "User.all.to_a"

# and benchmark
Benchmark.ips do |x|
  x.report do
    User.all.to_a
  end
end