ar_vs_poro.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem "rails"
  # If you want to test against edge Rails replace the previous line with this:
  # gem "rails", github: "rails/rails", branch: "main"

  gem "sqlite3"
  gem "benchmark-ips"
  gem "vernier"
end

require "active_record"
require "benchmark/ips"
require "logger"

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

ActiveRecord::Schema.define do
  create_table :products, force: true do |t|
  end

  create_table :product_variants, force: true do |t|
    t.integer :product_id

    15.times do |i|
      t.string :"string_#{i}", null: false, default: ""
    end

    10.times do |i|
      t.integer :"integer_#{i}"
    end

    10.times do |i|
      t.boolean :"bool_#{i}"
    end

    t.boolean :is_not_deleted, default: true, null: false

    t.timestamps
  end
end

class Product < ActiveRecord::Base
  has_many :product_variants
end

class ProductVariant < ActiveRecord::Base
  belongs_to :product

  scope :deleted, -> { ignoring_soft_deletion.where(is_not_deleted: nil) }
  scope :not_deleted, -> { where(is_not_deleted: true) }
  scope :ignoring_soft_deletion, -> { unscope(where: :is_not_deleted) }

  default_scope { not_deleted }
end

class ProductVariantPORO
  attr_accessor :product_id

  15.times do |i|
    attr_accessor :"string_#{i}"
  end

  10.times do |i|
    attr_accessor :"integer_#{i}"
  end

  10.times do |i|
    attr_accessor :"bool_#{i}"
  end

  init = [
    "# frozen_string_literal: true",
    "def initialize(attributes)",
  ]
  init << "@product_id = attributes[:product_id]"
  15.times do |i|
    init << "@string_#{i} = attributes[:string_#{i}] || ''"
  end

  10.times do |i|
    init << "@integer_#{i} = attributes[:integer_#{i}] || ''"
  end

  10.times do |i|
    init << "@bool_#{i} = attributes[:bool_#{i}] || ''"
  end
  init << "end"
  class_eval(init.join("\n"))
end

attributes = {
  product_id: 42,
}
15.times do |i|
  attributes[:"string_#{i}"] = "#{i}" * 20
end

10.times do |i|
  attributes[:"integer_#{i}"] = i
end

10.times do |i|
  attributes[:"integer_#{i}"] = false
end

Benchmark.ips do |x|
  x.report("PORO") do
    2_000.times { ProductVariantPORO.new(attributes) }
  end

  x.report("ActiveRecord") do
    2_000.times { ProductVariant.new(attributes) }
  end

  x.compare!(order: :baseline)
end

# require "vernier"
# Vernier.profile(out: "ar_new_profile.json") do
#   200_000.times { ProductVariant.new(attributes) }
# end
#

dup_hack.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem "rails"
  # If you want to test against edge Rails replace the previous line with this:
  # gem "rails", github: "rails/rails", branch: "main"

  gem "sqlite3"
  gem "benchmark-ips"
  gem "vernier"
end

require "active_record"
require "benchmark/ips"
require "logger"

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

ActiveRecord::Schema.define do
  create_table :products, force: true do |t|
  end

  create_table :product_variants, force: true do |t|
    t.integer :product_id

    15.times do |i|
      t.string :"string_#{i}", null: false, default: ""
    end

    10.times do |i|
      t.integer :"integer_#{i}"
    end

    10.times do |i|
      t.boolean :"bool_#{i}"
    end

    t.boolean :is_not_deleted, default: true, null: false

    t.timestamps
  end
end

class Product < ActiveRecord::Base
  has_many :product_variants
end

class ProductVariant < ActiveRecord::Base
  belongs_to :product

  scope :deleted, -> { ignoring_soft_deletion.where(is_not_deleted: nil) }
  scope :not_deleted, -> { where(is_not_deleted: true) }
  scope :ignoring_soft_deletion, -> { unscope(where: :is_not_deleted) }

  default_scope { not_deleted }
end

class ProductVariantPORO
  attr_accessor :product_id

  15.times do |i|
    attr_accessor :"string_#{i}"
  end

  10.times do |i|
    attr_accessor :"integer_#{i}"
  end

  10.times do |i|
    attr_accessor :"bool_#{i}"
  end

  init = [
    "# frozen_string_literal: true",
    "def initialize(attributes)",
  ]
  init << "@product_id = attributes[:product_id]"
  15.times do |i|
    init << "@string_#{i} = attributes[:string_#{i}] || ''"
  end

  10.times do |i|
    init << "@integer_#{i} = attributes[:integer_#{i}] || ''"
  end

  10.times do |i|
    init << "@bool_#{i} = attributes[:bool_#{i}] || ''"
  end
  init << "end"
  class_eval(init.join("\n"))
end

attributes = {
  product_id: 42,
}
15.times do |i|
  attributes[:"string_#{i}"] = "#{i}" * 20
end

10.times do |i|
  attributes[:"integer_#{i}"] = i
end

10.times do |i|
  attributes[:"integer_#{i}"] = false
end

# Benchmark.ips do |x|
#   x.report("PORO") do
#     2_000.times { ProductVariantPORO.new(attributes) }
#   end
#
#   x.report("ActiveRecord") do
#     2_000.times { ProductVariant.new(attributes) }
#   end
#
#   x.compare!(order: :baseline)
# end

template = ProductVariant.new

require "vernier"
Vernier.profile(out: "ar_new_profile.json") do
  200_000.times { template.dup.assign_attributes(attributes) }
end