pythonのgevent同步异步区别

 #!/usr/bin/env python

 from urllib import  request

 import  gevent

 from gevent import monkey

 import time

 monkey.patch_all() # 把当前程序所有的IO操作给我单独的做上标记。

 def f(url):

     resp = request.urlopen(url)

     data = resp.read()

     print(len(data))

 urls = ["https://www.python.org",

         "https://www.yahoo.com",

         "https://github.com"

         ]

 time_start = time.time()

 for url in urls:

     f(url)

 print("同步花费时间：",time.time()-time_start)

 asy_time = time.time()

 gevent.joinall({

     gevent.spawn(f,"https://www.python.org"),

     gevent.spawn(f,"https://www.yahoo.com"),

     gevent.spawn(f,"https://github.com"),

 })

 print("异步花费时间：",time.time()-asy_time)

C:\Users\Administrator\AppData\Local\Programs\Python\Python37\python.exe D:/PythonStudy/charm/01/day10/爬虫.py

48822

479812

64096

同步花费时间： 4.925281763076782

48822

64096

477025

异步花费时间： 3.1961827278137207

Process finished with exit code 0