小测python3.5高性能sanic异步框架

Python3.4 和 Python3.5 有个较大区别是 asyncio库进化到 async关键字了. python3.5 当然是向下兼容的，官方在3.5这个版本里推进 async 、await 关键字. async 其实跟 @asyncio.coroutine 相等的， await是跟 asyncio 的 yield from 差不多的. python 2.7 与 python 3.5 我都在使用，对我个人最直观的感受是 async 有点壳子的感觉，很多一些网络库用的还是2.7的. 在异步的语法上也没有gevent用的爽 . 仁者见仁智者见智吧.

该文章写的有些乱，欢迎来喷 ! 另外文章后续不断更新中，请到原文地址查看更新. http://xiaorui.cc/?p=4139

不知道什么时候圈子里火了一个高性能的异步非阻塞框架 sanic ，搜了一大圈，貌似没看到有人的实测报告，及生产环境中遇到的问题。 python3.5+ 的 sanic 相关技术文章实在匮乏，但我还是很惊奇sanic在github中的介绍，强大到脚踢各种python web的框架….

sanic github 地址:
https://github.com/channelcat/sanic

既然我说是小测，那么肯定是瞎测试了，哈哈. 这里也不考虑分布式压测及test的标准性。那么一句话，就干!

Server	Implementation	Requests/sec
Sanic	Python 3.5 + uvloop	33,342
Wheezy	gunicorn + meinheld	20,244
Falcon	gunicorn + meinheld	18,972
Bottle	gunicorn + meinheld	13,596
Flask	gunicorn + meinheld	4,988
Kyoukai	Python 3.5 + uvloop	3,889
Aiohttp	Python 3.5 + uvloop	2,979
Tornado	Python 3.5	2,138

这个表格体现的数据还是有些意思的， Falcon，Bottle，Flask 都是使用 gunicorn多进程框架，使用meinheld来做wsgi网关… 至于 Aiohttp 、Kyoukai 跟着一个uvloop 。这测试报告里tornado看样子是性能最差的？不至于吧… 很是怀疑作者测试的hello world …

下面我将采用不理智的方法测试 sanic 的性能 , 同步的逻辑就不测试了，主要还是测试异步下的性能体现.

先前我通过sanic框架写了一些简单的业务逻辑，中间会涉及到redis及mysql. 但总的来说基于asyncio的那些第三方网络库有些粗糙，使用方法上会有各种的不爽，另外性能没觉得多厉害…

测试的代码很简单，就是加了个asyncio.sleep() , 另外已经做了 ulimit 和 sysctl的优化, 不会出现open many files的提示. 因为是本地之间的测试，ab作为

import asyncio
from sanic import Sanic
from sanic.response import json


app = Sanic()


@app.route("/")
async def test(request):
    await asyncio.sleep(1)
    return json({"blog": " xiaorui.cc "})

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8000)

下面是测试的结果，QPS在900左右

Concurrency Level:      1000
Time taken for tests:   11.438 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      1070000 bytes
HTML transferred:       170000 bytes
Requests per second:    874.32 [#/sec] (mean)
Time per request:       1143.752 [ms] (mean)
Time per request:       1.144 [ms] (mean, across all concurrent requests)
Transfer rate:          91.36 [Kbytes/sec] received

可惜sanic有时会崩溃…

  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 178 in bail_out
  File "/usr/local/lib/python3.5/dist-packages/sanic/server.py", line 174 in write_error
  ...
已放弃 (核心已转储)

Python 2.7 tornado的测试结果

Concurrency Level:      1000
Time taken for tests:   8.983 seconds
Complete requests:      5000
Failed requests:        0
Total transferred:      1035000 bytes
HTML transferred:       60000 bytes
Requests per second:    556.63 [#/sec] (mean)
Time per request:       1796.519 [ms] (mean)
Time per request:       1.797 [ms] (mean, across all concurrent requests)
Transfer rate:          112.52 [Kbytes/sec] received

Python 3.5 tornado的测试结果

Concurrency Level:      1000
Time taken for tests:   12.240 seconds
Complete requests:      5000
Failed requests:        0
Total transferred:      1035000 bytes
HTML transferred:       60000 bytes
Requests per second:    408.49 [#/sec] (mean)
Time per request:       2448.060 [ms] (mean)
Time per request:       2.448 [ms] (mean, across all concurrent requests)
Transfer rate:          82.57 [Kbytes/sec] received

下面是Tornado的测试代码: (python2.7 3.5 都可以跑)

#xiaorui.cc

import datetime

from tornado import web, ioloop, gen, options

class MainHandler(web.RequestHandler):

    @gen.coroutine
    def sleep(self, seconds):
    ¦   yield gen.Task(
    ¦   ¦   ioloop.IOLoop.current().add_timeout,
    ¦   ¦   deadline=datetime.timedelta(seconds=seconds))

    @gen.coroutine
    def get(self):
    ¦   yield self.sleep(seconds=1)
    ¦   self.write("when i sleep")

application = web.Application([
    (r'/', MainHandler),
], debug=True)

if __name__ == "__main__":
    options.parse_command_line()
    application.listen(8000)
    ioloop.IOLoop.instance().start()

如果不考虑第三方库的质量和性能，单单纯纯的sleep测试来看， sanic这个框架性能还真的是更高一筹… 要比 tornado 高个 30%左右… 如果你的python版本正好是3.5，有敢于尝试新事物，我觉得可以试试…

sanic后期的更新里，不再像以前那样，只是做语法上的介绍。现在更多的展示实际开发中遇到的场景，比如 sanic mysql, postgres的使用 . sanic上建议使用uvloop支持的第三方库. 3.4以后那些asyncio库虽然也可以用，但不能性能最大化…

END.

大家觉得文章对你有些作用！如果想赏钱，可以用微信扫描下面的二维码，感谢!
另外再次标注博客原地址 xiaorui.cc

发表评论 取消回复

发表评论取消回复