Re: binary delta

Greg Hudson wrote:
> On Thu, 2002-01-24 at 08:42, Torgeir Veimo wrote:
>
>>If my info is correct, subversion uses the vcdiff delta compression
>>technique for sending binary deltas over the wire.
>>
>
> No... we use the vdelta algorithm to produce block-copy instructions,
> and we use a home-grown "svndiff" format for encoding those
> instructions. vcdiff would be more compact, but probably only a little
> bit, and we found that it was much more complicated than we were
> comfortable with.

I have experimented with the xdelta algorithm, using the gdiff file
format. I guess the format is not that different from your homegrown
svndiff. (http://www.w3.org/TR/NOTE-gdiff-19970901.html)

Did you find vdelta better than xdelta at generating compact diffs?

> Well, you can search for "vdelta" or "vcdiff" in the mailing list
> archives, or browse them starting around August 2000 (maybe a little
> before that).

Will do.

-- 
-Torgeir
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