Gunicorn

ELI5 — The Vibe Check

Gunicorn (Green Unicorn) is the battle-tested Python HTTP server that's been running production apps since forever. It pre-forks multiple worker processes so your app can handle many requests at once. Pair it with Uvicorn workers for async frameworks and you've got a production powerhouse.

Real Talk

Gunicorn is a Python WSGI HTTP server that uses a pre-fork worker model to handle concurrent requests. It supports multiple worker types (sync, async, gevent, uvicorn), automatic worker process management, graceful restarts, and integrates with most Python web frameworks. It's the standard production server for Django and Flask.

Show Me The Code

# Django/Flask (sync workers)
gunicorn myapp.wsgi:application --workers 4

# FastAPI (async uvicorn workers)
gunicorn main:app -w 4 -k uvicorn.workers.UvicornWorker

When You'll Hear This

"Run Gunicorn with 2x CPU cores + 1 workers for optimal throughput." / "We use Gunicorn with uvicorn workers for our FastAPI production deployment."