require 'benchmark'

N = 10_000

Benchmark.bm(20) do |x|
  x.report('<<') do
    N.times do |i|
      one = 'one' * i
      two = 'two' * i
      three = 'three' * i
      y = one << two << three
    end
  end
  x.report('+') do
    N.times do |i|
      one = 'one' * i
      two = 'two' * i
      three = 'three' * i
      y = one + two + three
    end
  end
  x.report('#{one}#{two}#{three}') do
    N.times do |i|
      one = 'one' * i
      two = 'two' * i
      three = 'three' * i
      y = "#{one}#{two}#{three}"
    end
  end
  x.report('one#{two}#{three}') do
    N.times do |i|
      two = 'two' * i
      three = 'three' * i
      y = "one#{two}#{three}"
    end
  end
  x.report('onetwo#{three}') do
    N.times do |i|
      three = 'three' * i
      y = "onetwo#{three}"
    end
  end
end