python 单线程和多线程执行对比 -3

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from myThread import MyThread from time import ctime, sleep     def fib(x):     sleep(0.005)     if x < 2: return 1     return (fib(x - 2) + fib(x - 1))     def fac(x):     sleep(0.1)     if x < 2: return 1     return (x * fac(x - 1))     def sum(x):     sleep(0.1)     if x < 2:         return 1     return (x + sum(x - 1))   funcs = [fib, fac, sum] n = 12 def main():     nfuncs = range(len(funcs))     print('SINGLE THREAD')     for i in nfuncs:         print('starting', funcs[i].__name__, 'at:', ctime())         print(funcs[i](n))         print(funcs[i].__name__, 'finished at:', ctime())       print("\n  MULTIPLE THREADS")     threads = []     for i in nfuncs:         t = MyThread(funcs[i],(n,),funcs[i].__name__)         threads.append(t)     for i in nfuncs:         threads[i].start()     for i in nfuncs:         threads[i].join()         print(threads[i].getResult())     print('ALL DOME')   if __name__ == '__main__':     main()