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From: "Marco Costalba" <mcostalba@gmail.com>
Subject: Re: [WISH] Store also tag dereferences in packed-refs
Date: Sun, 19 Nov 2006 23:25:49 +0100
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To: "Linus Torvalds" <torvalds@osdl.org>
Sender: git-owner@vger.kernel.org

On 11/19/06, Linus Torvalds <torvalds@osdl.org> wrote:
>
>
>
> For example, it's often (but not always) faster to do all the readdir's
> separately, and then sort the thing by inode number, and try to avoid
> back-and-forth movement. But quite frankly, that kind of stuff probably
> isn't sane to do in "git show-refs".

Excuse me for my ignorance, but isn' it the job of OS disk schedulers?

>
> Anyway, I think that if we really want to make "git show-refs" go fast
> when things are cold in the cache, and with lots ot tags and "-d" (which
> is a reasonable case to optimize for: it's probably exactly what we end up
> doing both for gitweb _and_ for "git-send-pack"), we'd need to expand the
> packed-refs file with the deref cache.
>

Probably also gitk, currently it uses (the slower) "git ls-remote"
instead of "git peek-remote" or "git show-refs" but the concept seems
the same.