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by semiquaver 1234 days ago
“Their own” implementation is just zlib, already in use throughout git since the dawn of the project for other purposes like blob storage [1].

Depending on how you measure it, zlib might be considered significantly more ubiquitous than gzip itself. At any rate it’s certainly no less battle tested.

[1] https://git-scm.com/book/en/v2/Git-Internals-Git-Objects