Sanic

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!

Benchmarks

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()

@app.route("/")
async def test(request):
    return json({"hello": "world"})

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

Installation

• 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

Documentation

Documentation on Readthedocs.

TODO

• Streamed file processing
• http2

Limitations

• No wheels for uvloop and httptools on Windows :(

Final Thoughts

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