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A microframework based on uvloop, httptools, and learnings of flask

Project Description

Sanic is a Flask-like Python 3.5+ web server that’s written to go fast. It’s based on the work done by the amazing folks at magicstack, and was inspired by this article.

On top of being Flask-like, Sanic supports async request handlers. This means you can use the new shiny async/await syntax from Python 3.5, making your code non-blocking and speedy.

Sanic is developed on GitHub. Contributions are welcome!

If you have a project that utilizes Sanic make sure to comment on the issue that we use to track those projects!


All tests were run on an AWS medium instance running ubuntu, using 1 process. Each script delivered a small JSON response and was tested with wrk using 100 connections. Pypy was tested for Falcon and Flask but did not speed up requests.

Server Implementation Requests/sec Avg Latency
Sanic Python 3.5 + uvloop 33,342 2.96ms
Wheezy gunicorn + meinheld 20,244 4.94ms
Falcon gunicorn + meinheld 18,972 5.27ms
Bottle gunicorn + meinheld 13,596 7.36ms
Flask gunicorn + meinheld 4,988 20.08ms
Kyoukai Python 3.5 + uvloop 3,889 27.44ms
Aiohttp Python 3.5 + uvloop 2,979 33.42ms
Tornado Python 3.5 2,138 46.66ms

Hello World Example

from sanic import Sanic
from sanic.response import json

app = Sanic()

async def test(request):
    return json({"hello": "world"})

if __name__ == "__main__":"", port=8000)


  • python -m pip install sanic

To install sanic without uvloop or json using bash, you can provide either or both of these environmental variables using any truthy string like ‘y’, ‘yes’, ‘t’, ‘true’, ‘on’, ‘1’ and setting the NO_X to true will stop that features installation.

  • SANIC_NO_UVLOOP=true SANIC_NO_UJSON=true python -m pip install sanic


  • Streamed file processing
  • http2


  • No wheels for uvloop and httptools on Windows :(

Final Thoughts

        ▀▀▀██████▄▄▄       _______________
      ▄▄▄▄▄  █████████▄  /                 \
     ▀▀▀▀█████▌ ▀▐▄ ▀▐█ |   Gotta go fast!  |
   ▀▀█████▄▄ ▀██████▄██ | _________________/
   ▀▄▄▄▄▄  ▀▀█▄▀█════█▀ |/
        ▀▀▀▄  ▀▀███ ▀       ▄▄
     ▄███▀▀██▄████████▄ ▄▀▀▀▀▀▀█▌
   ██▀▄▄▄██▀▄███▀ ▀▀████      ▄██
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▌    ▐▀████▐███▒▒▒▒▒▐██▌
▀▄▄▄▄▀   ▀▀████▒▒▒▒▄██▀
      ▄██▀     ▀▀▀  █
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Release History

Release History

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
sanic-0.5.4-py3-none-any.whl (43.8 kB) Copy SHA256 Checksum SHA256 py3 Wheel May 9, 2017
sanic-0.5.4.tar.gz (35.1 kB) Copy SHA256 Checksum SHA256 Source May 9, 2017

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