From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 03 Sep 2010 17:03:15 GMT
Subject: Re: git pack/unpack over bittorrent - works!
Message-ID: <7vsk1qzrn0.fsf@alter.siamese.dyndns.org>
In-Reply-To: <alpine.LFD.2.00.1009022033520.19366@xanadu.home>

Nicolas Pitre <nico@fluxnic.net> writes:

>>  i can - so that git pack-objects, after "git repack -f", returns a
>> canonical pack! :)
>
> But did you try it?  The -f means "don't reuse any existing pack data 
> and recompute every delta from scratch to find the best matches".  This 
> is a very very costly operation that most people happily live without.

Also "the best matches" will change, hopefully in a better way, with newer
vintage of git.  Optimization like c83f032 (apply delta depth bias to
already deltified objects, 2007-07-12) that is based on heuristics derived
from empirical statistics can and should be allowed to happen.