#!/usr/bin/env ruby

require 'better-benchmark'

num_inner_iterations = 1_000_000

puts "Single Quote Append vs. Double Quote Append"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ''
  num_inner_iterations.times do |i|
    x = 'This is a test ' << i.to_s
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " << i.to_s
  end
}
Benchmark.report_on result


puts "\nAppend vs. Interpolation"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " << i.to_s
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test #{i}"
  end
}
Benchmark.report_on result


puts "\nTwo Appends vs. Interpolation"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " << i.to_s << "x"
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test #{i}x"
  end
}
Benchmark.report_on result


puts "\nConcatenation vs. Interpolation"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " + i.to_s
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test #{i}"
  end
}
Benchmark.report_on result


puts "\nTwo Concatenations vs. Interpolation"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " + i.to_s + "x"
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test #{i}x"
  end
}
Benchmark.report_on result


puts "\nConcatenation vs. Append"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " + i.to_s
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " << i.to_s
  end
}
Benchmark.report_on result


num_inner_iterations = 300_000

puts "\nSeveral Concatenations vs. Several Appends"
result = Benchmark.compare_realtime( :verbose => true ) {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " + i.to_s + "This is a test " + i.to_s + "This is a test " + i.to_s + "This is a test " + i.to_s + "This is a test " + i.to_s
  end
}.with {
  x = ""
  num_inner_iterations.times do |i|
    x = "This is a test " << i.to_s << "This is a test " << i.to_s << "This is a test " << i.to_s << "This is a test " << i.to_s << "This is a test " << i.to_s
  end
}
Benchmark.report_on result