python 协程 gevent 简单测试

串行测试

from gevent import monkey; monkey.patch_all()#有IO才做时需要这一句
import gevent
import requests,time

start=time.time()
def f(url):
    print('GET: %s' % url)
    resp =requests.get(url)
    data = resp.text
    print('%d bytes received from %s.' % (len(data), url))

f('http://127.0.0.1:8001/s')
f('http://127.0.0.1:8001/s')
f('http://127.0.0.1:8001/s')

print("cost time:",time.time()-start)

#输入  共用 15s
#GET: http://127.0.0.1:8001/s
#13 bytes received from http://127.0.0.1:8001/s.
#GET: http://127.0.0.1:8001/s
#13 bytes received from http://127.0.0.1:8001/s.
#GET: http://127.0.0.1:8001/s
#13 bytes received from http://127.0.0.1:8001/s.
#cost time: 15.034623622894287

并行测试

from gevent import monkey; monkey.patch_all()#有IO才做时需要这一句
import gevent
import requests,time

start=time.time()
def f(url):
    print('GET: %s' % url)
    resp =requests.get(url)
    data = resp.text
    print('%d bytes received from %s.' % (len(data), url))

gevent.joinall([
        gevent.spawn(f, 'http://127.0.0.1:8001/s'),
        gevent.spawn(f, 'http://127.0.0.1:8001/s'),
        gevent.spawn(f, 'http://127.0.0.1:8001/s'),
])

print("cost time:",time.time()-start)

# 输出 共用5s
# GET: http://127.0.0.1:8001/s
# GET: http://127.0.0.1:8001/s
# GET: http://127.0.0.1:8001/s
# 13 bytes received from http://127.0.0.1:8001/s.
# 13 bytes received from http://127.0.0.1:8001/s.
# 13 bytes received from http://127.0.0.1:8001/s.
# cost time: 5.034070014953613

被请求的tornado代码

sleep 5s

#!/bin/env python
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import tornado.httpclient
import tornado.gen
from tornado.concurrent import run_on_executor
from concurrent.futures import ThreadPoolExecutor

import time

from tornado.options import define, options
define("port", default=8001, help="run on the given port", type=int)

class SleepHandler(tornado.web.RequestHandler):
    executor = ThreadPoolExecutor(4)
    @tornado.web.asynchronous
    @tornado.gen.coroutine
    def get(self):
        res = yield self.sleep()
        self.write("when i sleep ")
        self.finish()

    @run_on_executor
    def sleep(self):
        time.sleep(5)
        return 5

if __name__ == "__main__":
    tornado.options.parse_command_line()
    app = tornado.web.Application(handlers=[
            (r"/s", SleepHandler)])
    http_server = tornado.httpserver.HTTPServer(app)
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()