Re: [PATCH] git exproll: steps to tackle gc aggression

From: Junio C Hamano <gitster@pobox.com>
Date: Aug 8, 2013, 18:52 UTC
Message-ID: <7va9ks9frm.fsf@alter.siamese.dyndns.org>
In-Reply-To: <201308081134.35735.mfick@codeaurora.org>

Martin Fick <mfick@codeaurora.org> writes:

> Assuming I understand what you are suggesting, would these 
> "young object" likely still get "deduped" in an efficient 
> way without doing history traversal (it sounds like they 
> would)?

Yes.

The very first thing pack-object machinery does is to get the list of object names and sort them in a certain order to help producing good deltas, and this initial input preprocessing will dedup them.

> If so, then yeah this might be nice, especially if the history
> traversal is what would speed this up.

That was the assumption behind the "it might help" suggestion. If that helps or not is not known yet, and since Ram started this subthread telling me not to talk about performance improvements, my time on this thread is _not_ spent on that (yet).