Re: [PATCH v6 2/2] refs.c: SSE4.2 optimizations for check_refname_component

From: Ondřej Bílka <neleai@seznam.cz>
Date: Jun 5, 2014, 12:58 UTC
Message-ID: <20140605125846.GB9316@domone.podge>
In-Reply-To: <539062D9.60000@web.de>

On Thu, Jun 05, 2014 at 02:30:17PM +0200, Torsten Bögershausen wrote:

Show 31 quoted lines

> On 2014-06-04 23.16, David Turner wrote:
> > 
> > Sure!  I actually went with > 120k to make measurement easier:
> > https://github.com/dturner-tw/many-refs
> Hm, I didn't get so man
> 
> git remote -v
> origin  https://github.com/dturner-tw/many-refs 
> 
>  wc .git/packed-refs 
>      750    1130   38868 .git/packed-refs
> 
> 
> 
> time git rev-parse HEAD
> 7ac416f789fd4f1e398449113f6e1ec1d699141a
> 
> real    0m0.008s
> user    0m0.002s
> sys     0m0.004s
> 
> where only patch 1/2 doesn't seem to speed up things on my system:
> 
> time ~/projects/git/tb.140604_DavidTurner_SSE4/git rev-parse HEAD
> 7ac416f789fd4f1e398449113f6e1ec1d699141a
> 
> real    0m0.010s
> user    0m0.002s
> sys     0m0.005s
> 
>

Could you run it 100 times to get better resolution? This could be just measurement error.