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#!/usr/bin/env ruby
# example to explain save!
# The save! feature expects to be run twice, generally with different Rubys.
# save! can also be used to compare modules changes which impact the run time
#
# If you're comparing ruby versions, Just use the version in the label
#
# x.report("ruby #{RUBY_VERSION}") { 'Bruce'.inspect }
#
# Or use a hash
#
# x.report("version" => RUBY_VERSION, "method" => 'bruce') { 'Bruce'.inspect }
#
# RUN_1: SAVE_FILE='run1.out' ruby examples/hold.rb
# Warming up --------------------------------------
# without 172.168k i/100ms
# Calculating -------------------------------------
# without 2.656M (± 3.3%) i/s - 13.429M in 5.062098s
#
# RUN_2: SAVE_FILE='run1.out' WITH_MODULE=true ruby examples/hold.rb
# Warming up --------------------------------------
# with 92.087k i/100ms
# Calculating -------------------------------------
# with 1.158M (± 1.4%) i/s - 5.801M in 5.010084s
#
# Comparison:
# without: 2464721.3 i/s
# with: 1158179.6 i/s - 2.13x slower
# CLEANUP: rm run1.out
require 'benchmark/ips'
Benchmark.ips do |x|
x.report(ENV['WITH_MODULE'] == 'true' ? 'with' : 'without') do
'Bruce'.inspect
end
if ENV['WITH_MODULE'] == 'true'
class String
def inspect
result = %w[Bruce Wayne is Batman]
result.join(' ')
end
end
end
x.save! ENV['SAVE_FILE'] if ENV['SAVE_FILE']
x.compare!
end
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