Compare between not define a method in subclass and define a method in subclass and call #super

benchmark.rb

require 'benchmark'

class A0
  def foo
    true
  end
end

(1..1000).each do |n|
  eval <<-RUBY
    class A#{n} < A#{n-1}
    end
  RUBY
end

class B0
  def foo
    true
  end
end

(1..1000).each do |n|
  eval <<-RUBY
    class B#{n} < B#{n-1}
      def foo
        super
      end
    end
  RUBY
end


Benchmark.bmbm do |x|
  x.report("implicit") { A1000.new.foo }
  x.report("explicit") { B1000.new.foo }
end

result

[~] ruby benchmark.rb
Rehearsal --------------------------------------------
implicit   0.010000   0.000000   0.010000 (  0.000501)
explicit   0.000000   0.000000   0.000000 (  0.008302)
----------------------------------- total: 0.010000sec

               user     system      total        real
implicit   0.000000   0.000000   0.000000 (  0.000139)
explicit   0.010000   0.000000   0.010000 (  0.007057)
[~]