Just Add Await: Retrofitting Async Into Django
summary
Moves from claim to implementation: adds ASGI support landed to Django, builds heavy glue like sync_to_async shims and a thread-local / executor layer to run legacy code, and measures progress with a branch that 90% tests pass. Explains tools (event loop, Daphne, threadpool executors), surprising pitfalls (SQLite thread sensitivity, context-switch costs at thousands of threads), and shows a partly working retrofit that still needs ORM and middleware hardening.
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chapters (32)
- 0:00Intro
- 0:40Overview
- 3:20Async
- 5:55Event Loops
- 8:26Threads
- 12:08Async vs synchronous code
- 14:38Dangers of asynchronous code
- 15:38Synchronous code
- 16:37Framework problems
- 18:10Async vs synchronous
- 21:35Thread Sensitivity
- 22:36Simplicity
- 24:00Django
- 25:20Outside in approach
- 25:59Phases
- 27:26Async Views
- 29:30WSGI
- 30:17Django and NIH
- 31:25Django and Whisky
- 33:31Whisky Handler
- 34:42GetResponse
- 36:03SGI Handler
- 37:02SGI Server
- 37:41SGI Compatibility
- 38:29File Uploads
- 40:16SGIRef
- 42:56SGIServer
- 43:34Views
- 47:38Middleware
- 51:03Sink Diffuse
- 52:09The RM
- 55:35The future
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