Re: Git and GCC

Jon Loeliger [off-list ref] writes:

On Thu, 2007-12-06 at 00:09, Linus Torvalds wrote:

quoted

Git also does delta-chains, but it does them a lot more "loosely". There 
is no fixed entity. Delta's are generated against any random other version 
that git deems to be a good delta candidate (with various fairly 
successful heursitics), and there are absolutely no hard grouping rules.

I'd like to learn more about that.  Can someone point me to
either more documentation on it?  In the absence of that,
perhaps a pointer to the source code that implements it?

See Documentation/technical/pack-heuristics.txt,
but the document predates and does not talk about delta
reusing, which was covered here:

    http://thread.gmane.org/gmane.comp.version-control.git/16223/focus=16267

I guess one question I posit is, would it be more accurate
to think of this as a "delta net" in a weighted graph rather
than a "delta chain"?

Yes.