prelude: |
  module AR; end
  class AR::Base
    def create_or_update
      nil
    end
    def save
      create_or_update
    end
  end
  class Foo < AR::Base; end
  class Bar < AR::Base; end
  o1 = Foo.new
  o2 = Bar.new
benchmark:
  vm2_poly_same_method: |
    o1.save; o2.save;
    o1.save; o2.save;
    o1.save; o2.save;
    o1.save; o2.save;
    o1.save; o2.save;
    o1.save; o2.save;
    o1.save; o2.save;
    o1.save; o2.save;
loop_count: 6000000