Uvicorn as the ASGI server

Uvicorn is a lightning-fast ASGI server implementation for Python, built on uvloop and httptools to power high-concurrency async applications.

Uvicorn serves as the critical bridge between Python asynchronous frameworks and the network, delivering industry-leading performance by leveraging the uvloop event loop and httptools parser. It supports HTTP/1.1 and WebSockets natively, handling over 6,000 requests per second in standard benchmarks while maintaining sub-millisecond average latency. Developers typically pair it with FastAPI or Starlette to manage thousands of concurrent connections (using the --workers flag for multi-process scaling). Its design focuses on resource efficiency and strict ASGI compliance, making it the standard choice for production-grade async deployments where raw speed and low overhead are non-negotiable.

https://www.uvicorn.org/