Re: [PLUG] Git: net time gain or loss?

[JP Vossen <jp@jpsdomain.org>]

On 12/22/18 10:59 AM, Rich Freeman wrote:
> Actually, it is the opposite.  With git EVERY commit makes a complete
> copy of the code base, whether branching or otherwise.  Ironically
> cvs/subversion actually did store deltas with regular commits (not
> sure offhand about branches).

CVS did that, SVN does not.  SVN is like Git; each commit in SVN is a 
complete copy of the *entire* repo at an atomic point in time.  But 
every file is just a pointer to the last one, except for what you changed.

See more details in my previous reply.


> However, git also makes use of content-hashing deduplication at both
> the directory and file level, and packing does further compression on
> top of this.  So, these copies don't cost much.

Yeah, SVN doesn't do the hashing de-dup because it's dealing with files 
& paths, not blobs.  That's a really big Git win in my server config 
example from yesterday:
	2.7G of config files
		From around 200 (very similar) servers
		Checked into Git daily
	209M used by the .git dir!

Later,
JP
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