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From: Nicolas Pitre <nico@fluxnic.net>
To: Jakub Narebski <jnareb@gmail.com>
Cc: Avery Pennarun <apenwarr@gmail.com>, Theodore Tso <tytso@mit.edu>,
	Jeff King <peff@peff.net>, Will Palmer <wmpalmer@gmail.com>,
	git@vger.kernel.org
Subject: Re: Why is "git tag --contains" so slow?
Date: Thu, 08 Jul 2010 19:15:09 -0400 (EDT)	[thread overview]
Message-ID: <alpine.LFD.2.00.1007081910480.6020@xanadu.home> (raw)
In-Reply-To: <201007082320.05017.jnareb@gmail.com>

On Thu, 8 Jul 2010, Jakub Narebski wrote:

> If I remember correctly with pack v4 some operations like getting size
> of tree object needs encoding to current format, so they are slower than
> they should be (and perhaps a bit slower than current implementation).
> But that should be I think rare (well, unless one streams to 
> 'git cat-file --batch / --batch-check').

I didn't write the code to recreate canonical object format yet, but I 
suspect that the pack v4 object encoding will have to carry the size for 
the canonical version.

> Would pack v4 need index v4?

So far, no.

> By the way, rev-cache project was started mainly to make "counting
> objects" part of clone / fetch faster.  Would pack v4 offer the same
> without rev-cache?

That's indeed the main goal.


Nicolas

  parent reply	other threads:[~2010-07-08 23:16 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-01  0:54 Why is "git tag --contains" so slow? Theodore Ts'o
2010-07-01  0:58 ` Shawn O. Pearce
2010-07-03 23:27   ` Sam Vilain
2010-07-01  1:00 ` Avery Pennarun
2010-07-01 12:17   ` tytso
2010-07-01 15:03     ` Jeff King
2010-07-01 15:38       ` Jeff King
2010-07-02 19:26         ` tytso
2010-07-03  8:06           ` Jeff King
2010-07-04  0:55             ` tytso
2010-07-05 12:27               ` Jeff King
2010-07-05 12:33                 ` [RFC/PATCH 1/4] tag: speed up --contains calculation Jeff King
2010-10-13 22:07                   ` Jonathan Nieder
2010-10-13 22:56                   ` Clemens Buchacher
2011-02-23 15:51                   ` Ævar Arnfjörð Bjarmason
2011-02-23 16:39                     ` Jeff King
2010-07-05 12:34                 ` [RFC/PATCH 2/4] limit "contains" traversals based on commit timestamp Jeff King
2010-10-13 23:21                   ` Jonathan Nieder
2010-07-05 12:35                 ` [RFC/PATCH 3/4] default core.clockskew variable to one day Jeff King
2010-07-05 12:36                 ` [RFC/PATCH 4/4] name-rev: respect core.clockskew Jeff King
2010-07-05 12:39                 ` Why is "git tag --contains" so slow? Jeff King
2010-10-14 18:59                   ` Jonathan Nieder
2010-10-16 14:32                     ` Clemens Buchacher
2010-10-27 17:11                       ` Jeff King
2010-10-28  8:07                         ` Clemens Buchacher
2010-07-05 14:10                 ` tytso
2010-07-06 11:58                   ` Jeff King
2010-07-06 15:31                     ` Will Palmer
2010-07-06 16:53                       ` tytso
2010-07-08 11:28                         ` Jeff King
2010-07-08 13:21                           ` Will Palmer
2010-07-08 13:54                             ` tytso
2010-07-07 17:45                       ` Jeff King
2010-07-08 10:29                         ` Theodore Tso
2010-07-08 11:12                           ` Jakub Narebski
2010-07-08 19:29                             ` Nicolas Pitre
2010-07-08 19:39                               ` Avery Pennarun
2010-07-08 20:13                                 ` Nicolas Pitre
2010-07-08 21:20                                   ` Jakub Narebski
2010-07-08 21:30                                     ` Sverre Rabbelier
2010-07-08 23:10                                       ` Nicolas Pitre
2010-07-08 23:15                                     ` Nicolas Pitre [this message]
2010-07-08 11:31                           ` Jeff King
2010-07-08 14:35                           ` Johan Herland
2010-07-08 19:06                           ` Nicolas Pitre
2010-07-07 17:50                       ` Jeff King

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