From: "Alex Bennée" <kernel-hacker@bennee.com>
To: John Keeping <john@keeping.me.uk>
Cc: Thomas Rast <trast@inf.ethz.ch>,
Ramkumar Ramachandra <artagnon@gmail.com>,
Git Mailing List <git@vger.kernel.org>
Subject: Re: Poor performance of git describe in big repos
Date: Fri, 31 May 2013 09:14:49 +0100 [thread overview]
Message-ID: <CAJ-05NOEuxOVy7LFp_XRa_08G-Mj0x7q+RiR=u71-iyfOXpHow@mail.gmail.com> (raw)
In-Reply-To: <20130530193046.GG17475@serenity.lan>
On 30 May 2013 20:30, John Keeping <john@keeping.me.uk> wrote:
> On Thu, May 30, 2013 at 06:21:55PM +0200, Thomas Rast wrote:
>> Alex Bennée <kernel-hacker@bennee.com> writes:
>>
>> > On 30 May 2013 16:33, Thomas Rast <trast@inf.ethz.ch> wrote:
>> >> Alex Bennée <kernel-hacker@bennee.com> writes:
> <snip>
>> > Will it be loading the blob for every commit it traverses or just ones that hit
>> > a tag? Why does it need to load the blob at all? Surely the commit
>> > tree state doesn't
>> > need to be walked down?
>>
>> No, my theory is that you tagged *the blobs*. Git supports this.
Wait is this the difference between annotated and non-annotated tags?
I thought a non-annotated just acted like references to a particular
tree state?
>
> You can see if that is the case by doing something like this:
>
> eval $(git for-each-ref --shell --format '
> test $(git cat-file -t %(objectname)^{}) = commit ||
> echo %(refname);')
>
> That will print out the name of any ref that doesn't point at a
> commit.
Hmm that didn't seem to work. But looking at the output by hand I
certainly have a mix of tags that are commits vs tags:
09:08 ajb@sloy/x86_64 [work.git] >git for-each-ref | grep "refs/tags"
| grep "commit" | wc -l
1345
09:12 ajb@sloy/x86_64 [work.git] >git for-each-ref | grep "refs/tags"
| grep -v "commit" | wc -l
66
Unfortunately I can't just delete those tags as they do refer to known
releases which we obviously care about. If I delete the tags on my
local repo and test for a speed increase can I re-create them as
annotated tag objects?
--
Alex, homepage: http://www.bennee.com/~alex/
next prev parent reply other threads:[~2013-05-31 8:15 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-30 10:38 Poor performance of git describe in big repos Alex Bennée
2013-05-30 11:33 ` Ramkumar Ramachandra
2013-05-30 13:09 ` Alex Bennée
2013-05-30 14:32 ` Ramkumar Ramachandra
2013-05-30 15:01 ` Alex Bennée
2013-05-30 15:17 ` Ramkumar Ramachandra
2013-05-30 15:33 ` Thomas Rast
2013-05-30 16:01 ` Alex Bennée
2013-05-30 16:21 ` Thomas Rast
2013-05-30 16:44 ` Thomas Rast
2013-05-30 19:01 ` Antoine Pelisse
2013-05-30 20:00 ` [PATCH 1/2] sha1_file: silence sha1_loose_object_info Thomas Rast
2013-05-30 20:00 ` [PATCH 2/2] lookup_commit_reference_gently: do not read non-{tag,commit} Thomas Rast
2013-05-30 21:22 ` Jeff King
2013-05-31 0:52 ` Duy Nguyen
2013-05-31 8:08 ` Thomas Rast
2013-05-31 16:00 ` Jeff King
2013-05-31 6:43 ` Ramkumar Ramachandra
2013-05-31 8:16 ` Thomas Rast
2013-05-30 19:30 ` Poor performance of git describe in big repos John Keeping
2013-05-31 8:14 ` Alex Bennée [this message]
2013-05-31 8:24 ` Thomas Rast
2013-05-31 8:40 ` Alex Bennée
2013-05-31 8:46 ` Thomas Rast
2013-05-31 9:57 ` Alex Bennée
2013-06-03 8:02 ` Alex Bennée
2013-06-03 16:32 ` Junio C Hamano
2013-06-03 17:48 ` Junio C Hamano
2013-05-31 10:27 ` Thomas Rast
2013-05-31 16:17 ` Jeff King
2013-06-03 8:39 ` Alex Bennée
2013-06-03 14:49 ` Jeff King
2013-05-31 8:32 ` John Keeping
2013-05-31 8:49 ` Alex Bennée
2013-05-31 8:59 ` John Keeping
2013-05-30 11:48 ` John Keeping
2013-05-30 12:29 ` Alex Bennée
2013-05-30 13:20 ` Duy Nguyen
[not found] ` <CAJ-05NPacjAEC99Ntd9eMnTD9_PMMYFob-_tAx5CeSB79TkRSg@mail.gmail.com>
2013-05-30 13:45 ` Duy Nguyen
2013-05-30 14:02 ` Alex Bennée
2013-05-30 13:16 ` Alex Bennée
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