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	for linux-mtd@lists.infradead.org; Tue, 10 Apr 2007 13:24:54 -0400
Subject: Re: Centralized summary as a way to speed up "ls" time
From: Artem Bityutskiy <dedekind@infradead.org>
To: akorolev <alexey.korolev@intel.com>
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Date: Tue, 10 Apr 2007 20:24:28 +0300
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On Tue, 2007-04-10 at 20:53 +0400, akorolev wrote:
> Hello Ferenc,
>=20
> While using JFFS2 on NAND devices with large size and many files I faced=20
> the problem of very slow "ls" performance.
> On folder which contains ~40 files and ~80MB ls could take ~25sec!

One way could be to introduce an aggregated dentry node which would
store several, say 32 direntries together, instead of having
per-direntry node.

--=20
Best regards,
Artem Bityutskiy (=D0=91=D0=B8=D1=82=D1=8E=D1=86=D0=BA=D0=B8=D0=B9 =D0=90=
=D1=80=D1=82=D1=91=D0=BC)