require 'benchmark'

class Object
  def either?(*args)
    args.include? self
  end
end

count = 10000000

Benchmark.bmbm do |x|

  x.report "includes?" do
    count.times do
      [:one, :two].include?(:one)
    end
  end

  x.report "either?" do
    count.times do
      :one.either?(:one, :two)
    end
  end

  x.report "compare" do
    count.times do
      :one == :one or :one == :two
    end
  end
end