Benchmark to compare hash and keyword arguments in method invocations

ruby_optional_arguments_benchmark.rb

require 'benchmark'

COUNT = 10_000_000
NAME = "Test Name"
EMAIL = "[email protected]"

class Person
  attr_accessor :name, :email
  
  def set_with_hash(options = {})
    @name = options[:name] || "default name"
    @email = options[:email] || "[email protected]"
  end
  
  def set_with_keywords(name: "default name", email: "[email protected]")
    @name = name
    @email = email
  end
end

Benchmark.bm(10) do |x|
  x.report("hash:") do
    COUNT.times do
      p = Person.new
      p.set_with_hash(name: NAME, email: EMAIL)
    end
  end

  x.report("keywords:") do
    COUNT.times do
      p = Person.new
      p.set_with_keywords(name: NAME, email: EMAIL)
    end
  end
end

                 user     system      total        real
hash:        8.130000   0.290000   8.420000 (  8.420061)
keywords:   13.720000   0.540000  14.260000 ( 14.275596)