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 = "test@example.org"

class Person
  def initialize(name:, email:)
    @name = name
    @email = email
  end
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
     OpenStruct.new(name: NAME, email: EMAIL)
   end
  end

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

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


user     system      total        real
hash:           1.310324   0.000000   1.310324 (  1.313880)
openstruct:     6.497740   0.002865   6.500605 (  6.514609)
struct:         3.147043   0.000004   3.147047 (  3.154298)
class:          5.571384   0.000000   5.571384 (  5.583647)