[nodesocket]

I'm running a Python 3.13 Flask app in production using gunicorn and gevent (workers=1) with gevent monkey patching. Using ab can get around 320 requests per second. Performance is decent but I'm wondering how much a lift would be required to migrate to FastAPI. Would I see performance increases staying with gunicorn + gevent but upgrading Python to 3.14?

[nine_k]

Did you profile your code? Is it CPU-bound or IO-bound? Does it max out your CPU? Usually it's the DB access that determines the single-threaded performance of backend code.

[stackskipton]

We have similar at work, 3.14 should just be a Dockerfile change away.

FastAPI might improve your performance by a little but seriously, either PyPy or rewriting into compiled language.

[nodesocket]

I did some quick tests increasing workers=2 and workers=3 and requests per second nearly scaled linearly so seems just throwing more CPU cores is the quick answer in the mid-term.