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

benchmark.rb

require 'benchmark'

class Base
  def foo
    true
  end
end

class Implicit < Base
end

class Explicit < Base
  def foo
    super
  end
end

Benchmark.bmbm do |x|
  x.report("implicit") do
    instance = Implicit.new
    1_000_000.times { instance.foo }
  end

  x.report("explicit") do
    instance = Explicit.new
    1_000_000.times { instance.foo }
  end
end

result

Rehearsal --------------------------------------------
implicit   0.130000   0.000000   0.130000 (  0.133219)
explicit   0.190000   0.000000   0.190000 (  0.187135)
----------------------------------- total: 0.320000sec

               user     system      total        real
implicit   0.130000   0.000000   0.130000 (  0.132344)
explicit   0.190000   0.000000   0.190000 (  0.186354)