Using a monorepo causes a lot of performance challenges for git. Here's how we solve them at Canva.

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A new clone of the Canva monorepo can take anywhere from 15 seconds to minutes due to the number of changes merged by engineers. The code base has grown from a few thousand lines to just under 60 million lines of code in 2022. This growth significantly degraded local git performance with commands like taking longer and longer to run.

We Put Half a Million files in One git Repository, Here's What We Learned

tl;dr - you learned not to put such a huge amount of files in a single git repo right?
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Thanks for sharing your experience.