attribute_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"
  gem "benchmark-memory"
end

require "active_record"
require "minitest/autorun"
require "logger"

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")

ActiveRecord::Schema.define do
  create_table :models, force: true do |t|
    t.string :col1
    t.string :col2
    t.string :col3
    t.string :col4
    t.string :col5
    t.string :col6
    t.string :col7
    t.string :col8
    t.string :col9
  end
end

ActiveRecord::Base.immutable_strings_by_default = true

class Model < ActiveRecord::Base; end

ENV["RECORDS"] ||= "10000"

Model.transaction do
  ENV["RECORDS"].to_i.times do |i|
    Model.create!(
      col1: "hello, world!",
      col2: "hello, world!",
      col3: "hello, world!",
      col4: "hello, world!",
      col5: "hello, world!",
      col6: "hello, world!",
      col7: "hello, world!",
      col8: "hello, world!",
      col9: "hello, world!"
    )
  end
end

benchmark = -> x {
  x.report("attribute access") do
    records = Model.find_by_sql("SELECT * FROM models")
    records.each do |record|
      record.id
      record.col1
      record.col2
      record.col3
      record.col4
      record.col5
      record.col6
      record.col7
      record.col8
      record.col9
    end
  end
}

puts "IPS"
Benchmark.ips(&benchmark)

puts "MEMORY"
Benchmark.memory(&benchmark)