gistfile1.rb

require 'benchmark/ips'
require 'securerandom'
require 'set'

Benchmark.ips do |x|

  sizes = [ 2, 8, 32, 128, 512 ]
  sizes.map! { |size| a = [].tap { |a| size.times { a << SecureRandom.uuid } } }

  sizes.each do |size|
    x.report("new set: #{size.size}") do
      set = Set.new(size)
      set.include?('a')
    end

    x.report("new arry: #{size.size}") do
      arry = size
      arry.include?('a')
    end

    set = Set.new(size)

    x.report("set: #{size.size}") do
      set.include?('a')
    end

    x.report("arry: #{size.size}") do
      arry = size
      arry.include?('a')
    end
  end
end