Uvloop released - advanced event loop implementation for asyncio in Python

In the standard Python 3.4 library, the asyncio module appeared at the time, which made it possible to quickly and conveniently write asynchronous code. And as of Python 3.5, async / await constructions were added to the syntax, which finally formed the asynchrony “out of the box” as a beautiful and harmonious part of the language.



Although asyncio itself allows writing high-load web applications, performance optimization was not a priority when creating a module.
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One of the authors of the mentioned PEP-492 (async / await) Yuri Selivanov (on Habré is 1st 1 , his twitter ) took up the development of an alternative implementation of the event loop for asyncio - uvloop . Yesterday the first alpha version of the module came out, as the author wrote a detailed post .

In short, uvloop works about 2 times faster than Node.js and is almost as good as Go.

Using

uvloop is written in Cython and is based on libuv .

You can install the module as standard (Windows is not currently supported):

pip install uvloop 

Using is also not difficult:

 import asyncio import uvloop asyncio.set_event_loop_policy(uvloop.EventLoopPolicy()) 

Now any call to asyncio.get_event_loop () will return an instance of uvloop.

Performance

More information about benchmarks (methodology and conclusions) can be read in the original , below only the final graphs.

Results for simple TCP requests of different sizes:



HTTP requests: