From: Christopher Li <git@chrisli.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: git@vger.kernel.org
Subject: Re: Yet another base64 patch
Date: Wed, 13 Apr 2005 22:24:13 -0400 [thread overview]
Message-ID: <20050414022413.GB18655@64m.dyndns.org> (raw)
In-Reply-To: <425DEF64.60108@zytor.com>
On Wed, Apr 13, 2005 at 09:19:48PM -0700, H. Peter Anvin wrote:
> Checking out the total kernel tree (time checkout-cache -a into an empty
> directory):
>
> Cache cold Cache hot
> stock 3:46.95 19.95
> base64 5:56.20 23.74
> flat 2:44.13 15.68
> It seems that the flat format, at least on ext3 with dircache, is
> actually a major performance win, and that the second level loses quite
> a bit.
That is not surprising due to the directory index in ext3. Htree is pretty
good at random access and the hashed file name distribute evenly, that is
the best case for htree.
Chris
next prev parent reply other threads:[~2005-04-14 5:31 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-14 4:19 Yet another base64 patch H. Peter Anvin
2005-04-14 2:24 ` Christopher Li [this message]
2005-04-14 5:36 ` H. Peter Anvin
2005-04-14 2:42 ` Christopher Li
2005-04-14 6:27 ` H. Peter Anvin
2005-04-14 6:35 ` H. Peter Anvin
2005-04-14 7:40 ` Linus Torvalds
2005-04-14 16:58 ` H. Peter Anvin
2005-04-14 17:42 ` Linus Torvalds
2005-04-14 19:11 ` bert hubert
2005-04-14 19:25 ` H. Peter Anvin
2005-04-14 21:47 ` bert hubert
2005-04-15 0:44 ` Linus Torvalds
2005-04-15 1:06 ` H. Peter Anvin
2005-04-17 4:10 ` David Lang
2005-04-18 6:23 ` H. Peter Anvin
2005-04-15 1:07 ` H. Peter Anvin
2005-04-15 3:58 ` Paul Jackson
2005-04-17 3:53 ` David A. Wheeler
2005-04-17 4:05 ` Paul Jackson
2005-04-17 6:38 ` David A. Wheeler
2005-04-17 8:16 ` Paul Jackson
2005-04-17 17:51 ` David A. Wheeler
2005-04-17 18:19 ` Petr Baudis
2005-04-18 5:13 ` David A. Wheeler
2005-04-18 12:59 ` Kevin Smith
2005-04-18 16:42 ` David A. Wheeler
2005-04-17 14:30 ` Daniel Barkalow
2005-04-17 16:29 ` David A. Wheeler
2005-04-14 4:25 ` H. Peter Anvin
2005-04-14 8:17 ` Linus Torvalds
2005-04-14 17:02 ` H. Peter Anvin
2005-04-15 23:55 ` Paul Dickson
2005-04-18 6:28 ` H. Peter Anvin
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