FastAPI Day 2: ASGI Changed Everything — Understanding Event Loops & Concurrent Requests
ASGI Changed Everything — Understanding Event Loops & Concurrent Requests Most developers learn async backwards. They start with: async def hello(): without understanding: what problem async solves why event loops exist what concurrency actually means FastAPI only makes sense once you understand the engine underneath it. And that engine is ASGI. The Real Problem Was Never Speed This is the first mental model to fix. Async is not primarily about making your code execute faster. ...