assign_attributes_benchmark.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"
  gem "sqlite3"
  gem "benchmark-ips"
end

require "active_record"
require "minitest/autorun"
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 :title
    t.string :author
    t.boolean :published
    t.integer :score
    t.string :tags
    t.text :content
    t.integer :another_field
  end
end

class Post < ActiveRecord::Base
end

SCENARIOS = {
  "All symbols" => {
    title: "My post",
    author: "John",
    published: true,
    score: 500,
    tags: "Software development,Web development",
    content: "random text" * 100,
    another_field: 55555
  },
  "Mixed" => {
    "title" => "My post",
    author: "John",
    "published" => true,
    score: 500,
    "tags" => "Software development,Web development",
    content: "random text" * 100,
    "another_field" => 55555
  },
  "All strings" => {
    "title" => "My post",
    "author" => "John",
    "published" => true,
    "score" => 500,
    "tags" => "Software development,Web development",
    "content" => "random text" * 100,
    "another_field" => 55555
  }
}

SCENARIOS.each_pair do |name, value|
  puts
  puts " #{name} ".center(80, "=")
  puts

  post = Post.new

  Benchmark.ips do |x|
    x.report("assign_attributes") { post.assign_attributes(value) }
  end
end