This can easily be automated. You could send a hash of the binary and have a custom patch either pulled from cache or created (the largest "patch" being the who

This can easily be automated. You could send a hash of the binary and have a custom patch either pulled from cache or created (the largest "patch" being the whole binary). You'd end up with a fairly complete cache very fast though. Binary diffing is a mostly solved problem. This assumes that there's a list of hashes that correlate to known historical binaries. If the hash doesn't match you fall back to sending the whole thing.