I totally agree with you. This article was really a response to a lot of hype around async web servers in Python.

I kind of knew what to expect, but wanted to throw real numbers against it. I was surprised to see a 10x slowdown with the async switch in Django.

Only reliable web server is an Erlang web server.

No connection proxy in this case. The pooled sync test uses client side pooling which shows better performance. Using a proxy would have the same effect, just moves the pooling to server side.

It is using the async driver. I am using FastAPI’s thin wrapper around SQLAlchemy which also does some slight tuning for it to work better with FastAPI in an async mode.

This is running with concurrent requests. 64 workers firing request to be exact.