Benchmark for rails/rails#45035

rails45035.rb

# frozen_string_literal: true

require "bundler/inline"

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

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: "rails/rails", branch: "main"
  gem "sqlite3"
  gem "benchmark-ips"
end

require 'active_record'
require 'logger'

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts, force: true do |t|
    t.string :author
    t.string :title
  end

  create_table :each_posts, force: true do |t|
    t.string :author
    t.string :title
  end
end

class Post < ActiveRecord::Base
  def deconstruct_keys(keys)
    keys.each_with_object({}) do |key, deconstructed|
      string_key = key.to_s
      deconstructed[key] = _read_attribute(string_key) if attribute_method?(string_key)
    end
  end
end

class EachPost < ActiveRecord::Base
  def deconstruct_keys(keys)
    deconstructed = {}

    keys.each do |key|
      string_key = key.to_s
      deconstructed[key] = _read_attribute(string_key) if attribute_method?(string_key)
    end

    deconstructed
  end
end

def match_model(model)
  case model
  in { author: 'John' }
    true
  else
    false
  end
end

p1object = Post.new(author: 'John', title: 'Rails!')
p1each = EachPost.new(author: 'John', title: 'Rails!')

p2object = Post.new(author: 'Jane', title: 'Ruby!')
p2each = EachPost.new(author: 'Jane', title: 'Ruby!')

[p1object, p1each].each do |m|
  raise m.inspect unless match_model(m)
end
[p2object, p2each].each do |m|
  raise m.inspect if match_model(m)
end


Benchmark.ips do |x|
  x.report("each_with_object")      { match_model(p1object) }
  x.report("each") { match_model(p1each) }
  x.compare!
end

Benchmark.ips do |x|
  x.report("each_with_object")      { match_model(p2object) }
  x.report("each") { match_model(p2each) }
  x.compare!
end

result.txt

Warming up --------------------------------------
    each_with_object    95.004k i/100ms
                each   107.935k i/100ms
Calculating -------------------------------------
    each_with_object    959.392k (± 1.3%) i/s -      4.845M in   5.051211s
                each      1.063M (± 1.7%) i/s -      5.397M in   5.076504s

Comparison:
                each:  1063385.6 i/s
    each_with_object:   959391.7 i/s - 1.11x  (± 0.00) slower

Warming up --------------------------------------
    each_with_object    92.591k i/100ms
                each   105.836k i/100ms
Calculating -------------------------------------
    each_with_object    952.555k (± 2.0%) i/s -      4.815M in   5.056662s
                each      1.069M (± 1.9%) i/s -      5.398M in   5.048931s

Comparison:
                each:  1069442.7 i/s
    each_with_object:   952555.0 i/s - 1.12x  (± 0.00) slower