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.
The project documentation can be found here. Please also check out the wiki.
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_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 in a blog post about it.
uvloop requires Python 3.5 or greater and is available on PyPI. Use pip to install it:
$ pip install uvloop
Note that it is highly recommended to upgrade pip before installing uvloop with:
$ pip install -U pip
uvloop.install() before calling
asyncio.run() or manually creating an asyncio event loop:
import asyncio import uvloop async def main(): # Main entry-point. ... uvloop.install() asyncio.run(main())
Building From Source
To build uvloop, you'll need Python 3.5 or greater:
Clone the repository:
$ git clone --recursive [email protected]:MagicStack/uvloop.git $ cd uvloop
Create a virtual environment and activate it:
$ 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.