🚧 FastWSGI is still under development.

FastWSGI is an ultra fast WSGI server for Python 3.

Its written in C and uses libuv and llhttp under the hood for blazing fast performance.

FastWSGI is one of the fastest general use WSGI servers out there!

For a comparison against other popular WSGI servers, see PERFORMANCE.md

Install using the pip package manager.

pip install fastwsgi

Create a new file example.py with the following:

import fastwsgi

def app(environ, start_response):
    headers = [('Content-Type', 'text/plain')]
    start_response('200 OK', headers)
    return [b'Hello, World!']

if __name__ == '__main__':
    fastwsgi.run(wsgi_app=app, host='0.0.0.0', port=5000)

Run the server using:

python3 example.py

Or, by using the fastwsgi command:

fastwsgi example:app

See example.py for more details.

import fastwsgi
from flask import Flask

app = Flask(__name__)


@app.get('/')
def hello_world():
    return 'Hello, World!', 200


if __name__ == '__main__':
    fastwsgi.run(wsgi_app=app, host='127.0.0.1', port=5000)

To run the test suite using pytest, run the following command:

python3 -m pytest

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests where appropriate.

Special thank you to the following individuals who have made significant contributions to FastWSGI:

• Oleg S. (@remittor)

• Comprehensive error handling
• Complete HTTP/1.1 compliance
• Unit tests running in CI workflow