The FastAPI Architecture Map

From Uvicorn ASGI socket loops and non-blocking AnyIO threadpools to Rust-powered Pydantic V2 validation and hierarchical Depends() DAG resolution.

TRACK_01

ASGI & Starlette Core

Non-blocking I/O architectures, Uvicorn uvloop, and low-level ASGI scope handling.

1 topics

Why traditional WSGI synchronous servers block threads, and how ASGI enables non-blocking async Python I/O.

TRACK_02

Cooperative async/await multitasking and automatic ThreadPool routing for sync def.

1 topics

How FastAPI automatically routes standard "def" functions to external AnyIO thread pools to avoid blocking the main event loop.

TRACK_03

Rust pydantic-core serialization speedups and OpenAPI 3.1 JSON schema generation.

1 topics

The 20x speedup of Pydantic V2 using pydantic-core in Rust, strict type coercion, and JSON schema extraction.

TRACK_04

Hierarchical Depends() tree resolution, memoization cache, and yield context cleanup.

1 topics

How FastAPI builds a Directed Acyclic Graph (DAG) of Depends(), memoizes sub-dependencies, and executes teardown cleanup.

TRACK_05

Post-response BackgroundTasks queues, SSE streaming token generators, and WebSockets.

1 topics

Streaming real-time SSE tokens, full-duplex WebSockets, and firing background tasks after sending HTTP responses.

Loading FASTAPI::COSMOS...