object_query.rb

require 'bench_press'
extend BenchPress

author 'Ken Collins'
summary 'Object class inspection vs duck typing.'

reps 100_000

module Foo
  class Bar
    def to_foo
    end
  end
  class Batz
  end
end

@bar = Foo::Bar.new
@batz = Foo::Batz.new

measure "Object#is_a?" do
  @bar.is_a?(Foo::Bar)
  @batz.is_a?(Foo::Bar)
end

measure "Object#respond_to?" do
  @bar.respond_to?(:to_foo)
  @batz.respond_to?(:to_foo)
end