PORO vs attr_extras

13:30 $ rvm ls
   ruby-2.4.9 [ x86_64 ]
=> ruby-2.5.1 [ x86_64 ]
 * ruby-2.5.5 [ x86_64 ]
   ruby-2.5.7 [ x86_64 ]
   ruby-2.6.5 [ x86_64 ]


13:28 $ ruby poro_vs_attr_extras.rb 
Warming up --------------------------------------
PORO Parallel Assignment
                        77.276k i/100ms
PORO Sequential Assignment
                        94.895k i/100ms
  AttrExtras Private     7.943k i/100ms
Calculating -------------------------------------
PORO Parallel Assignment
                          1.195M (± 2.2%) i/s -     11.746M in  10.051377s
PORO Sequential Assignment
                          1.728M (± 0.8%) i/s -     17.271M in  10.029018s
  AttrExtras Private     91.919k (± 0.4%) i/s -    921.388k in  10.029671s
                   with 95.0% confidence

Comparison:
PORO Sequential Assignment:  1727784.5 i/s
PORO Parallel Assignment:    1195351.2 i/s - 1.45x  (± 0.03) slower
AttrExtras Private:            91919.1 i/s - 18.80x (± 0.17) slower
                   with 95.0% confidence

Code:
-----------------------------
# frozen_string_literal: true

# Install the necessary gems:
# gem install benchmark-ips
# gem install kalibera

require 'benchmark/ips'
require 'attr_extras'

# Enable and start GC before each job run. Disable GC afterwards.
#
# Inspired by https://www.omniref.com/ruby/2.2.1/symbols/Benchmark/bm?#annotation=4095926&line=182
class GCSuite
  def warming(*)
    run_gc
  end

  def running(*)
    run_gc
  end

  def warmup_stats(*)
  end

  def add_report(*)
  end

  private

  def run_gc
    GC.enable
    GC.start
    GC.disable
  end
end

suite = GCSuite.new

User = Struct.new(:id, :stuff)
user1 = User.new(1, stuff: rand(1000))
user2 = User.new(2, stuff: rand(1000))

class PoroParallelAssignment
  def initialize(user1, user2)
    @user1, @user2 = user1, user2
  end

  private

  attr_reader :user1, :user2
end

class PoroSequentialAssignment
  def initialize(user1, user2)
    @user1 = user1
    @user2 = user2
  end

  private

  attr_reader :user1, :user2
end

class AttrExtrasPrivate
  pattr_initialize :user1, :user2
end

Benchmark.ips do |x|
  x.config(:time => 10, :warmup => 5, :stats => :bootstrap, :confidence => 95)

  x.report('PORO Parallel Assignment') do
    PoroParallelAssignment.new(user1, user2)
  end

  x.report('PORO Sequential Assignment') do
    PoroSequentialAssignment.new(user1, user2)
  end

  x.report('AttrExtras Private') do
    AttrExtrasPrivate.new(user1, user2)
  end

  x.compare!
end