Uvicorn
Uvicorn is an ASGI (Asynchronous Server Gateway Interface) server implementation for Python, designed to run asynchronous web applications built with frameworks like FastAPI, Starlette, or Django Channels. It is built on uvloop and httptools for high performance, making it one of the fastest ASGI servers available. Uvicorn handles HTTP and WebSocket protocols, enabling real-time communication and efficient handling of concurrent requests in modern Python web development.
Developers should use Uvicorn when deploying Python web applications that leverage asynchronous programming, particularly with ASGI-compatible frameworks like FastAPI or Starlette, as it provides superior performance and scalability for I/O-bound tasks. It is ideal for building APIs, microservices, or real-time applications where low latency and high concurrency are critical, such as in data-intensive or chat applications. Uvicorn is also commonly used in development environments due to its ease of setup and hot-reload capabilities.