Julian Foad created SVN-4702:
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             Summary: Binary delta format for git diff and patch
                 Key: SVN-4702
                 URL: https://issues.apache.org/jira/browse/SVN-4702
             Project: Subversion
          Issue Type: Improvement
            Reporter: Julian Foad
            Priority: Major


svn diff --git handles "binary" (non-text) files currently by emitting a simple 
format called "GIT binary patch : literal" that contains the whole of the old 
file (encoded into text) plus the whole of the new file (encoded into text). 
That works but is slow and space-hungry.

It should use "GIT binary patch : delta" format instead.

Git commit "[binary diff: further 
updates.|https://github.com/git/git/commit/0660626caff6ac3745cd7b7908a2ca540141a2ec]";
 introduced this format; I cannot find any other documentation.




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