什么是进程池_进程池的实现

from multiprocessing import Process import time #计算密集任务 def task1(): sum = 1 for i in range(10000000): sum *=i def task2(): sum = 1 for i in range(10000000): sum *=i def task3(): sum = 1 for i in range(10000000): sum *=i def task4(): sum = 1 for i in range(10000000): sum *=i def task5(): sum = 1 for i in range(10000000): sum *=i def task6(): sum = 1 for i in range(10000000): sum *=i if __name__ == '__init__': # 开始时间 st_time = time.time() # 多进程情况下 p1 = Process(target = task1) p2 = Process(target = task2) p3 = Process(target = task3) p4 = Process(target = task4) p5 = Process(target = task5) p6 = Process(target = task6) p1.start() p2.start() p3.start() p4.start() p5.start() p6.start() p1.join() p2.join() p3.join() p4.join() p5.join() p6.join() print(time.time()-st_time) ''' 1.05321354643464 '''

from threading import Thread import time #计算密集任务 def task1(): time.sleep(3) def task2(): time.sleep(3) def task3(): time.sleep(3) def task4(): time.sleep(3) def task5(): time.sleep(3) def task6(): time.sleep(3) if __name__ == '__main__': #开始时间 st_time = time.time() #多线程情况下 t1 = Thread(target = task1) t2 = Thread(target = task2) t3 = Thread(target = task3) t4 = Thread(target = task4) t5 = Thread(target = task5) t6 = Thread(target = task6) t1.start() t2.start() t3.start() t4.start() t5.start() t6.start() t1.join() t2.join() t3.join() t4.join() t5.join() t6.join() print(time.time - st_time) ''' 3.0035946873164 '''