From: Linus Torvalds <torvalds@osdl.org>
To: Joachim Berdal Haga <c.j.b.haga@fys.uio.no>
Cc: Jeff King <peff@peff.net>,
Joachim B Haga <cjhaga@student.matnat.uio.no>,
git@vger.kernel.org
Subject: Re: Compression speed for large files
Date: Mon, 3 Jul 2006 16:02:39 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0607031556480.12404@g5.osdl.org> (raw)
In-Reply-To: <44A99961.8090504@fys.uio.no>
On Tue, 4 Jul 2006, Joachim Berdal Haga wrote:
>
> Here's a test with "time gzip -[169] -c file >/dev/null". Random data
> from /dev/urandom, kernel headers are concatenation of *.h in kernel
> sources. All times in seconds, on my puny home computer (1GHz Via Nehemiah)
That "Via Nehemiah" is probably a big part of it.
I think the VIA Nehemiah just has a 64kB L2 cache, and I bet performance
plummets if the tables end up being used past that.
And I think a large part of the higher compressions is that they allow the
compression window and tables to grow bigger.
Linus
next prev parent reply other threads:[~2006-07-03 23:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-03 11:13 Compression speed for large files Joachim B Haga
2006-07-03 12:03 ` Alex Riesen
2006-07-03 12:42 ` Elrond
2006-07-03 13:44 ` Joachim B Haga
2006-07-03 13:32 ` Joachim Berdal Haga
[not found] ` <Pine.LN X.4.64.0607031030150.1213@localhost.localdomain>
2006-07-03 14:33 ` Nicolas Pitre
2006-07-03 14:54 ` Yakov Lerner
2006-07-03 15:17 ` Johannes Schindelin
2006-07-03 16:31 ` Linus Torvalds
2006-07-03 18:59 ` [PATCH] Make zlib compression level configurable, and change default Joachim B Haga
2006-07-03 19:33 ` Linus Torvalds
2006-07-03 19:50 ` Linus Torvalds
2006-07-03 20:11 ` Joachim B Haga
2006-07-03 19:02 ` [PATCH] Use configurable zlib compression level everywhere Joachim B Haga
2006-07-03 19:43 ` Junio C Hamano
2006-07-07 21:53 ` David Lang
2006-07-08 2:10 ` Johannes Schindelin
2006-07-03 21:45 ` Compression speed for large files Jeff King
2006-07-03 22:25 ` Joachim Berdal Haga
2006-07-03 23:02 ` Linus Torvalds [this message]
2006-07-04 5:42 ` Joachim Berdal Haga
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