gistfile1.rbx

Object.class_eval do
  def deep_clone  
    Marshal::load(Marshal.dump(self))  
  end
end

Array.class_eval do
  def sum
    self.inject(0) { |sum, element| sum += element }
  end
  
  def avg
    sum/size
  end
end

def benchmark(runs=1000, &block)
  results = []
  runs.times do
    r0 = Time.now
    yield
    r1 = Time.now
    results << r1.to_f - r0.to_f
  end
  results.avg
end

a = (1..99999).to_a

t1 = benchmark { b = a.deep_clone }

t2 = benchmark { b = a.dup }

puts t1 - t2