From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: How git affects kernel.org performance
Date: Sun, 7 Jan 2007 10:28:53 +0000
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On Sun, Jan 07, 2007 at 10:03:36AM +0100, Willy Tarreau wrote:
> The problem is that I have no sufficient FS knowledge to argument why
> it helps here. It was a desperate attempt to fix the problem for us
> and it definitely worked well.

XFS does rather efficient btree directories, and it does sophisticated
readahead for directories.  I suspect that's what is helping you there.