Benchmarking Timecop vs ActiveSupport::Testing::TimeHelpers

Gemfile

# frozen_string_literal: true

ruby '2.5.3'

source "https://rubygems.org"

gem 'timecop'
gem 'activesupport'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    activesupport (5.2.2)
      concurrent-ruby (~> 1.0, >= 1.0.2)
      i18n (>= 0.7, < 2)
      minitest (~> 5.1)
      tzinfo (~> 1.1)
    concurrent-ruby (1.1.4)
    i18n (1.5.3)
      concurrent-ruby (~> 1.0)
    minitest (5.11.3)
    thread_safe (0.3.6)
    timecop (0.9.1)
    tzinfo (1.2.5)
      thread_safe (~> 0.1)

PLATFORMS
  ruby

DEPENDENCIES
  activesupport
  timecop

RUBY VERSION
   ruby 2.5.3p105

BUNDLED WITH
   1.17.3

results.txt

Timecop vs ActiveSupport::Testing::TimeHelpers
100000 trials each
                                       user     system      total        real
Timecop.freeze { }                 0.763503   0.002264   0.765767 (  0.767017)
freeze_time    { }                 3.617230   0.031886   3.649116 (  3.706262)
Timecop.freeze and Timecop.return  0.939708   0.005576   0.945284 (  0.958756)
freeze_time    and travel_back     2.707030   0.018956   2.725986 (  2.741195)

timecop_vs_time_helpers.rb

# frozen_string_literal: true

require 'timecop'
require 'active_support/testing/time_helpers'
require 'benchmark'

extend ActiveSupport::Testing::TimeHelpers

trials = 100_000
label_width = 32

puts 'Timecop vs ActiveSupport::Testing::TimeHelpers'
puts "#{trials} trials each"

Benchmark.bm(label_width) do |x|

  x.report('Timecop.freeze { }') do
    trials.times do
      Timecop.freeze { }
    end
  end

  x.report('freeze_time    { }') do
    trials.times do
      freeze_time { }
    end
  end

  x.report('Timecop.freeze and Timecop.return') do
    trials.times do
      Timecop.freeze and Timecop.return
    end
  end

  x.report('freeze_time    and travel_back') do
    trials.times do
      freeze_time and travel_back
    end
  end
end