Add Dask How to guide

[MarcSkovMadsen]

Closes #4233

Todo

• Remove temporary app.py, cluster.py etc. files.
• Upload Assets and replace links
• [] Solve ValueError: Can't find a pure Python 3 wheel for: 'contourpy>=1' on async.md page.

Maybe later

• [] Add Dask DataFrame section on using DaskDataFrame

Related Issues

• Document how to instantiate shared instances asynchronously #4238
• Panel widgets not working with fast async/ await functions #4237
• pn.cache not working with async code: RuntimeError: cannot reuse already awaited coroutine #4236
• Panel adds considerable overhead to longer running async tasks #4239

Assets

Asyncify

asyncify.mp4

fibonacci-queue.mp4

[MarcSkovMadsen]

@philippjfr some questions for you

• Would you accept a PR documenting how to combine Panel and Dask?
• Is it ok to be a separate notebook as currently commited? (Alternatively could be part of Async_and_Concurrency.ipynb notebook.
• Do you know how to fix the issues noted above?

[philippjfr]

Yes, let's start writing this as a how to guide. Put it in doc/how_to/performance/dask.md or similar.

[MarcSkovMadsen]

Some assets used in the documentation

dask-dashboard-empty.jpg

dask-viewer.jpg

pane-dask-async-tasks.jpg

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (208fb7b) 84.63% compared to head (4603900) 84.66%.
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4234      +/-   ##
==========================================
+ Coverage   84.63%   84.66%   +0.03%     
==========================================
  Files         295      296       +1     
  Lines       43977    44057      +80     
==========================================
+ Hits        37219    37303      +84     
+ Misses       6758     6754       -4     

Flag	Coverage Δ
ui-tests	40.63% <ø> (-0.01%)	⬇️
unitexamples-tests	72.73% <ø> (+0.02%)	⬆️

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[philippjfr]

Looks great. Do you have a PNG version of doc/_static/images/dask-dashboard-empty.jpg?

[MarcSkovMadsen]

Looks great. Do you have a PNG version of doc/_static/images/dask-dashboard-empty.jpg?

Yes. I've replaced the jpg with a png.