Re: Libification project (SoC)

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Mar 19, 2007, 13:55 UTC
Message-ID: <Pine.LNX.4.63.0703191453040.22628@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To: <20070319125233.GT18276@pasky.or.cz>

Hi,

On Mon, 19 Mar 2007, Petr Baudis wrote:

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> On Mon, Mar 19, 2007 at 01:37:18PM CET, Johannes Schindelin wrote:
> > Yes, you could write a program which can compare objects from several 
> > repos, but that is easy in fact: just set GIT_ALTERNATE_OBJECT_DIRECTORIES 
> > and you're done. Without changing the core of Git at all!
> 
> But you'll also need to access refs.

Yes, and you want it to bake some fine pizza, too.

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> And the key point here is reentrance - handling multiple repositories at 
> once is only part of this, actually probably the much bigger customer 
> would be multi-threaded programs. And easier creation of reusable 
> components and other libraries, and so on...
> 
> I believe the performance impact will be most likely absolutely 
> negligible. Of course we have no hard data, but I doubt it's this where 
> most of the CPU crunching is.

My time is very limited, and I see this thread going nowhere since everybody says "I like this, I like that", and nobody shows some hard data (me included). It almost feels like a Windows user community. Or Slashdot.

Anyway, I refuse to comment on these issues until somebody proves me wrong or right in my assumption that the impact on core Git (in terms of time _or_ lines of code) would be huge.

Ciao, Dscho