Benchmark to compare hash, OpenStruct, struct, and classes in Ruby

ruby_data_object_comparison.rb

require 'ostruct'
require 'benchmark'

COUNT = 10_000_000
NAME = "Test Name"
EMAIL = "[email protected]"

class Person
  attr_accessor :name, :email
end

Benchmark.bm(13) do |x|
  x.report("hash:") do
    COUNT.times do
      p = {name: NAME, email: EMAIL}
    end
  end

  x.report("openstruct:") do
    COUNT.times do
     p = OpenStruct.new
     p.name = NAME
     p.email = EMAIL
   end
  end

  x.report("struct:") do
    PersonStruct = Struct.new(:name, :email)
    COUNT.times do
      p = PersonStruct.new
      p.name = NAME
      p.email = EMAIL
    end
  end

  x.report("class:") do
    COUNT.times do
      p = Person.new
      p.name = NAME
      p.email = EMAIL
    end
  end
end

                    user     system      total        real
hash:           4.610000   0.250000   4.860000 (  4.857328)
openstruct:   134.900000   2.830000 137.730000 (137.811739)
struct:         3.940000   0.000000   3.940000 (  3.943897)
class:          2.480000   0.000000   2.480000 (  2.486405)