Benchmark ruby

benchmark.rb

sizes = [10, 50, 100, 1000]

sizes.each do |size|
  array = size.times.map { |i| rand(size) }
  threshold = size / 2

  Benchmark.bmbm(2) do |x|
    x.report("select #{size}") do
      array.select { |item| item > threshold }
        .each { |item| item * item }
    end

    x.report("if #{size}") do
      array.each do |item|
        item * item if item > threshold
      end
    end

    x.report("next #{size}") do
      array.each do |item|
        next unless item > threshold
        item * item
      end
    end
  end
end