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From: =?utf-8?B?T25kxZllaiBCw61sa2E=?= <neleai@seznam.cz>
Subject: Re: [PATCH v6 2/2] refs.c: SSE4.2 optimizations for
 check_refname_component
Date: Thu, 5 Jun 2014 14:58:46 +0200
Message-ID: <20140605125846.GB9316@domone.podge>
References: <1401853091-15535-1-git-send-email-dturner@twitter.com>
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 <1401916560.18134.167.camel@stross>
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Cc: David Turner <dturner@twopensource.com>,
	Duy Nguyen <pclouds@gmail.com>,
	Git Mailing List <git@vger.kernel.org>,
	Junio C Hamano <gitster@pobox.com>,
	Michael Haggerty <mhagger@alum.mit.edu>,
	David Turner <dturner@twitter.com>
To: Torsten =?iso-8859-1?Q?B=F6gershausen?= <tboegi@web.de>
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On Thu, Jun 05, 2014 at 02:30:17PM +0200, Torsten B=F6gershausen wrote:
> On 2014-06-04 23.16, David Turner wrote:
> >=20
> > Sure!  I actually went with > 120k to make measurement easier:
> > https://github.com/dturner-tw/many-refs
> Hm, I didn't get so man
>=20
> git remote -v
> origin  https://github.com/dturner-tw/many-refs=20
>=20
>  wc .git/packed-refs=20
>      750    1130   38868 .git/packed-refs
>=20
>=20
>=20
> time git rev-parse HEAD
> 7ac416f789fd4f1e398449113f6e1ec1d699141a
>=20
> real    0m0.008s
> user    0m0.002s
> sys     0m0.004s
>=20
> where only patch 1/2 doesn't seem to speed up things on my system:
>=20
> time ~/projects/git/tb.140604_DavidTurner_SSE4/git rev-parse HEAD
> 7ac416f789fd4f1e398449113f6e1ec1d699141a
>=20
> real    0m0.010s
> user    0m0.002s
> sys     0m0.005s
>=20
>=20
Could you run it 100 times to get better resolution? This could be just
measurement error.