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extras/kitchen_asyncio/README.md

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+This is an example of "parallel" processing using `asyncio`.
+
+We have the following work plan to prepare a dako:
+
+1. Fetch dako rusk
+2. Fetch olive oil
+3. Fetch tomato
+4. Chop tomato
+5. Fetch feta
+6. Water rusk
+7. Oil rusk
+8. Put tomato and feta on rusk
+9. Store ready dako on countertop
+
+Note that certain steps depend on earlier steps,
+e.g. 3→4, 1→6, 6→7, (7, 4, 2)→8, 8→9.
+
+File `kitchen_serial.py` has a straighforward Python implementation.
+
+Execute it as:
+  python kitchen_asyncio.py 5
+(This creates 5 dakos, one after each other.)
+
+File `kitchen_asyncio_naive.py` has a version which was converted
+to use `asyncio` and the jobs will be executed via the `asynio`
+task queue, but it will still run serially, because we wait for
+each task to be finished before continuing.
+
+Execute it as:
+  python kitchen_asyncio_naive.py 5
+(This creates 5 dakos, one after each other, using `asyncio`.)
+
+File `kitchen_asyncio_async.py` has a version adds effective
+parallelization by starting independent tasks in parallel and only
+awaiting when necessary for subsequent steps. Some steps were split
+out of the big function `prepare_dako`, to allow them to be awaited
+separately.
+
+Execute it as:
+  python kitchen_asyncio_async.py 5
+(This creates 5 dakos, one after each other, using `asyncio`.)