django-fastmig, makes `migrate` several times faster

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Released an experimental package making migrate much faster in large projects. Especially useful if you do pytest -create-db frequently, or run reverse migration testing in CI. Django’s own test suite passes with fastmig. Also tested on a 8 year old project with multiple revisions and migration squashes over the years.

Made it to speed up my own testing being bottlenecked by -create-db.
There’s a link in readme related to forum posts which discusses slow migrations.

If you give it a try (and have many migrations) feel free to share if you see any big performance improvements, or small :wink:

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Thanks for the work here Viktor, and linking back to Very slow migrations with large numbers of tables .

I think this is a valuable step forward on improving the slow migrations problem. You’ve described things well in your README, showing a clear understanding of bottlenecks.

Do you think you’ve found anything that could be applied to Django as an orthogonal step to @charettes 's model state ticket ?

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