text: import numpy as np
  import time
  from numba import jit
  
  @jit
  def quad(x0, n):
      x = x0
      for i in range(1, n):
          x = 4.0 * x * (1.0 - x)
      return x
  
  x = quad(0.2, 10)
  
  n = 10_000_000
  
  t = time.time()
  x = quad(0.2, n)
  elapsed = time.time() - t
  
  print("last val = {}".format(x))
  print("elapsed time = {}".format(elapsed))
  