accessors_v_arguments.rb

#! /usr/bin/env ruby

require "benchmark/ips"

class Foo
  attr_accessor :params

  def perform(params)
    self.params = params

    valid_signature?

    true
  end

  def valid_signature?
    params["timestamp"] && params["signature2"]
  end
end

class Bar
  def perform(params)
    valid_signature?(params["timestamp"], params["signature2"])

    true
  end

  def valid_signature?(timestamp, signature2)
    timestamp && signature2
  end
end

params = {
  "timestamp" => ARGV[0],
  "signature2" => ARGV[1],
}

puts "Using parameters: #{params.inspect}"

Benchmark.ips do |r|
  foo = Foo.new
  bar = Bar.new
  r.report("accessors") { foo.perform(params) }
  r.report("explicit")  { bar.perform(params) }
  r.compare!
end

results

Using parameters: {"timestamp"=>nil, "signature2"=>nil}
Warming up --------------------------------------
           accessors   193.376k i/100ms
            explicit   205.250k i/100ms
Calculating -------------------------------------
           accessors      4.442M (± 4.4%) i/s -     22.238M in   5.017131s
            explicit      4.362M (± 3.9%) i/s -     21.962M in   5.044638s

Comparison:
           accessors:  4442378.8 i/s
            explicit:  4361887.5 i/s - same-ish: difference falls within error

Using parameters: {"timestamp"=>"lorem", "signature2"=>nil}
Warming up --------------------------------------
           accessors   188.706k i/100ms
            explicit   218.508k i/100ms
Calculating -------------------------------------
           accessors      3.466M (± 2.2%) i/s -     17.361M in   5.011467s
            explicit      4.358M (± 1.7%) i/s -     21.851M in   5.015159s

Comparison:
            explicit:  4358187.6 i/s
           accessors:  3466060.5 i/s - 1.26x slower

Using parameters: {"timestamp"=>"lorem", "signature2"=>"ipsum"}
Warming up --------------------------------------
           accessors   189.323k i/100ms
            explicit   216.360k i/100ms
Calculating -------------------------------------
           accessors      3.436M (± 2.3%) i/s -     17.228M in   5.017498s
            explicit      4.321M (± 5.2%) i/s -     21.636M in   5.023240s

Comparison:
            explicit:  4320834.7 i/s
           accessors:  3435674.5 i/s - 1.26x slower