python多进程多线程测试

• • 对于计算密集型结果多进程更快

import time
from concurrent.futures import ProcessPoolExecutor,ThreadPoolExecutor
def add(num):
    a=0
    for i in range(num):
       a+=1
    return a
if __name__=="__main__":
    pool_process=ProcessPoolExecutor(10)
    x1=[]
    t_process=time.time()
    for i in range(10):
        a=pool_process.submit(add,10000000)
        x1.append(a)
    x=[i.result() for i in x1]
    print(x,"多进程",time.time()-t_process)
    x2=[]
    t_s=time.time()
    for j in range(10):
        b=add(10000000)
        x2.append(b)
    print(x2,"单进程",time.time()-t_s)
    p_thread=ThreadPoolExecutor(10)
    y=[]
    t_y=time.time()
    for i in range(10):
        a=p_thread.submit(add,10000000)
        y.append(a)
    z=[k.result() for k in y]
    print(z,"多线程",time.time()-t_y)