Fast implementation of asyncio event loop on top of libuv
uvloop is a fast, drop-in replacement of the built-in asyncio event loop. uvloop is implemented in Cython and uses libuv under the hood.
uvloop makes asyncio 2-4x faster.
The above chart shows the performance of an echo server with different message sizes. The sockets benchmark uses loop.sock_recv() and loop.sock_sendall() methods; the streams benchmark uses asyncio high-level streams, created by the asyncio.start_server() function; and the protocol benchmark uses loop.create_server() with a simple echo protocol. Read more about uvloop performance.
uvloop requires Python 3.5 or greater and is available on PyPI. Use pip to install it:
$ pip install uvloop
To make asyncio use uvloop, you can install the uvloop event loop policy:
import asyncio import uvloop asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
Building From Source
To build uvloop, you’ll need Python 3.5 or greater:
Clone the repository:
$ git clone --recursive email@example.com:MagicStack/uvloop.git $ cd uvloop
Create a virtual environment and activate it, for example:
$ python3.7 -m venv uvloop-dev $ source uvloop-dev/bin/activate
Install development dependencies:
$ pip install -r requirements.dev.txt
Build and run tests:
$ make && make test
uvloop is dual-licensed under MIT and Apache 2.0 licenses.
Release history Release notifications
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.