[prev in list] [next in list] [prev in thread] [next in thread]
List: git
Subject: Re: What's cooking in git.git (Jul 2009, #01; Mon, 06)
From: Junio C Hamano <gitster () pobox ! com>
Date: 2009-07-07 22:19:31
Message-ID: 7vk52k9lvw.fsf () alter ! siamese ! dyndns ! org
[Download RAW message or body]
"Shawn O. Pearce" <spearce@spearce.org> writes:
> Johannes Schindelin <Johannes.Schindelin@gmx.de> wrote:
>> On Mon, 6 Jul 2009, Junio C Hamano wrote:
>>
>> > * jh/notes (Sat May 16 13:44:17 2009 +0200) 5 commits
>> > - Teach "-m <msg>" and "-F <file>" to "git notes edit"
>> > - Add an expensive test for git-notes
>> > - Speed up git notes lookup
>> > - Add a script to edit/inspect notes
>> > - Introduce commit notes
>> >
>> > Dscho asked about the performance implications of this; I do not think I
>> > saw any progress on that yet...
>>
>> Neither did I.
>
> I was thinking about this the other day. We could use a hash of
> the commit timestamp as the top level directory. E.g. if we take
> the commit time of the commit and convert it to a date string,
> we could make the note path e.g.:
>
> YYYY/MM/COMMITSHA1
>
> The advantage is we only need to scan and hash the subtrees for
> the range of commits we are currently producing output for. As we
> go further back in time, we can evict entries for newer dates and
> hash the older dates.
Is the idea to make the tree object we need to scan for that particular
SHA-1 hash smaller?
If so, I am not sure how it would help over another approach of say taking
the first four hexdigits from the SHA-1 to use as the initial fan-out
YYYY, then two hexdigits for the secondary fan-out MM.
But probably I am missing something.
Besides, trees and blobs cannot be annotated with that approach.
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic