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From: Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH 2/6] Introduce commit notes
Date: Sun, 15 Jul 2007 17:05:01 -0700
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Cc: Alberto Bertogli <albertito@gmail.com>, git@vger.kernel.org,
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To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
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Junio C Hamano <gitster@pobox.com> writes:

> I wonder if it is worth using the fan-out tree structure for the
> underlying "note" trees, as the notes-index would be the primary
> way to access them.

Actually now I think about it I think this was a stupid
suggestion.  Creation of a new note in a reasonably well
populated note tree would be made 256-fold more efficient by
having the fan-out, as write-tree does not have to recompute the
other 255 tree objects thanks to the cache-tree data being
fresh.