Re: Curious about details of optimization of object database...

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On Fri, 9 Jan 2009, Matthieu Moy wrote:

> chris@xxxxxxxxxxxx writes:
> 
> > I'm told a commit is *not* a patch (diff), but, rather a copy of the entire
> > tree.
> 
> Conceptually, yes. But obviously, the storage format (pack) does what
> people usually call "delta-compression", which is basically storing
> only the diff against another, similar object.

Also, since objects representing files and directories are named after 
their actual content, having two commits with identical files and 
directories will of course share the same blob and tree objects for 
those identical parts.


Nicolas
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