text: 
  import timeit
  
  def autotimeit(stmt, setup='pass', repeat=3, mintime=0.2):
      timer = timeit.Timer(stmt, setup)
      number, time1 = autoscaler(timer, mintime)
      time2 = timer.repeat(repeat=repeat-1, number=number)
      return min(time2 + [time1]) / number
  
  def autoscaler(timer, mintime):
      number = 1
      for i in range(12):
          time = timer.timeit(number)
          if time > mintime:
              return number, time 
          number *= 10
      raise RuntimeError, 'function is too fast to test'    
      
  