Re: Feature request: git-svn dcommit should send deltas upstream

* Eric Wong:

Florian Weimer [off-list ref] wrote:

quoted

Looking at my network traffic and the Perl code, it seems to me that
git-svn fails to create a diff (delta) before sending data to the
server.  As a result, a few changes in a multi-megabyte file lead to a
large upload (similar to the situation with CVS).  git-svn should be
able to compute this diff in all cases because it has got an up-to-date
copy of the current revision in the Subversion repository.

As far as I can tell, this can't be fixed with a one-liner; some handles
need to be passed down to the code that actually handles the upload.

Odd.  Can you verify that svn(1) does not send full files in this case,
too?

These two are pcap files of single-line edits to the same file:

-rw-r--r-- 1 root root 1.3M 2008-08-29 11:54 /tmp/git
-rw-r--r-- 1 root root  40K 2008-08-29 11:53 /tmp/svn

It's been too long since I've looked at the SVN TxDelta API, but I
thought SVN::TxDelta::apply would take care of the delta computation for
us...

SVN::Git::Editor::M does not seem to make use of the base text.