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.. image:: https://img.shields.io/github/actions/workflow/status/MagicStack/uvloop/tests.yml?branch=master :target: https://github.com/MagicStack/uvloop/actions/workflows/tests.yml?query=branch%3Amaster
.. image:: https://img.shields.io/pypi/v/uvloop.svg :target: https://pypi.python.org/pypi/uvloop
.. image:: https://pepy.tech/badge/uvloop :target: https://pepy.tech/project/uvloop :alt: PyPI - Downloads
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 <http://uvloop.readthedocs.org/>
. Please also check out the
wiki <https://github.com/MagicStack/uvloop/wiki>
.
uvloop makes asyncio 2-4x faster.
.. image:: https://raw.githubusercontent.com/MagicStack/uvloop/master/performance.png :target: http://magic.io/blog/uvloop-blazing-fast-python-networking/
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 in a
blog post <http://magic.io/blog/uvloop-blazing-fast-python-networking/>
_
about it.
uvloop requires Python 3.8 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
As of uvloop 0.18, the preferred way of using it is via the
uvloop.run()
helper function:
.. code:: python
import uvloop
async def main():
# Main entry-point.
...
uvloop.run(main())
uvloop.run()
works by simply configuring asyncio.run()
to use uvloop, passing all of the arguments to it, such as debug
,
e.g. uvloop.run(main(), debug=True)
.
With Python 3.11 and earlier the following alternative snippet can be used:
.. code:: python
import asyncio
import sys
import uvloop
async def main():
# Main entry-point.
...
if sys.version_info >= (3, 11):
with asyncio.Runner(loop_factory=uvloop.new_event_loop) as runner:
runner.run(main())
else:
uvloop.install()
asyncio.run(main())
To build uvloop, you'll need Python 3.8 or greater:
Clone the repository:
.. code::
$ git clone --recursive git@github.com:MagicStack/uvloop.git $ cd uvloop
Create a virtual environment and activate it:
.. code::
$ python3.7 -m venv uvloop-dev $ source uvloop-dev/bin/activate
Install development dependencies:
.. code::
$ pip install -e .[dev]
Build and run tests:
.. code::
$ make $ make test
uvloop is dual-licensed under MIT and Apache 2.0 licenses.
FAQs
Fast implementation of asyncio event loop on top of libuv
We found that uvloop demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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