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From: John Baldwin <jhb@freebsd.org>
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Cc: "Bjoern A. Zeeb" <bz@freebsd.org>, Doug Barton <dougb@freebsd.org>
Subject: Re: svn commit: r190514 - head/sys/conf
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On Thursday 13 August 2009 2:57:10 pm Doug Barton wrote:
> Bjoern A. Zeeb wrote:
> > Author: bz
> > Date: Sat Mar 28 23:17:18 2009
> > New Revision: 190514
> > URL: http://svn.freebsd.org/changeset/base/190514
> > 
> > Log:
> >   For kernel builds reduce the impact of svnversion, just scanning
> >   src/sys and not the entire src/ tree.
>
> Also, what problem are we really trying to solve here? With a
> populated cache it takes on average 5 seconds to run all of src, and
> just under 1 to do only sys. Is 4 seconds really that important to
> save? With a dry cache I'm sure it takes a little longer, but has
> anyone actually measured this?

It takes far longer than 5 seconds here against a local SVN repo over NFS.

-- 
John Baldwin