What is the reason that the FastAPI server is capable of handling multiple requests simultaneously in synchronous mode?

edit

The FastAPI server is designed to use asynchronous programming techniques based on the ASGI specification, instead of traditional synchronous techniques. This allows the server to handle multiple requests simultaneously without blocking each other. By using asynchronous code, the server can switch between tasks efficiently while one task is waiting on a response, allowing the server to process more requests in less time. Additionally, FastAPI uses the asyncio library in Python which allows it to handle multiple requests simultaneously without the need for additional threads or processes, leading to improved performance and scalability.