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From: Mark Felder <feld@FreeBSD.org>
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Subject: Re: Renumber users and groups
Date: Wed, 21 Aug 2013 11:48:54 -0500
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On Wed, Aug 21, 2013, at 11:36, Mark Felder wrote:
> 
> Those solutions sound pretty handy if I need to move the files at the
> same time. mtree should do this in-place with minimal fuss as it's just
> confirming permissions and ownership on all files.
>

I also just thought of an idea I need to benchmark: running mtree with
and without nscd. I bet nscd could speed it up a lot.