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by rurban 1866 days ago
In embedded almost everybody uses efficient binary delta diffs and patching for DFOTA (delta firmware over the air update). Jojodiff exists as GPL and MIT variants.

http://jojodiff.sourceforge.net/

https://github.com/janjongboom/janpatch

Rsync is also very popular, even if not that efficient. xdelta, bsdiff, BDelta, bdiff are all crap.