From: Nicolas Pitre <nico@cam.org>
To: Junio C Hamano <junkio@cox.net>
Cc: git@vger.kernel.org
Subject: Re: [PATCH] always start looking up objects in the last used pack first
Date: Wed, 30 May 2007 23:24:55 -0400 (EDT) [thread overview]
Message-ID: <alpine.LFD.0.99.0705302320530.11491@xanadu.home> (raw)
In-Reply-To: <alpine.LFD.0.99.0705302152180.11491@xanadu.home>
On Wed, 30 May 2007, Nicolas Pitre wrote:
> To test this I split the Linux repository into 66 packs and performed a
> "time git-rev-list --objects --all > /dev/null". Best results are as
> follows:
>
> Pack Sort w/o this patch w/ this patch
> -------------------------------------------------------------
> recent objects last 26.4s 20.9s
> recent objects first 24.9s 18.4s
>
> This shows that the pack order based on object age has some influence,
> but that the last-used-pack heuristic is even more significant in
> reducing object lookup.
For reference, the same operation on a fully packed into a single pack
repository takes 17.1s. So this looks damn good to me.
Nicolas
next prev parent reply other threads:[~2007-05-31 3:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-31 2:48 [PATCH] always start looking up objects in the last used pack first Nicolas Pitre
2007-05-31 3:24 ` Nicolas Pitre [this message]
2007-05-31 5:02 ` Shawn O. Pearce
2007-05-31 15:39 ` Nicolas Pitre
2007-06-02 15:00 ` Dana How
2007-06-02 14:53 ` Dana How
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