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From: Andreas Robinson <andr345@gmail.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: John Stoffel <john@stoffel.org>, Alain Knaff <alain@knaff.lu>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] lib: add fast lzo decompressor
Date: Sat, 04 Apr 2009 16:34:36 +0200	[thread overview]
Message-ID: <1238855676.18423.32.camel@andreas-desktop> (raw)
In-Reply-To: <49D65700.5060202@zytor.com>

Hi,

after enabling checksumming (adler32) and adding an overrun check, based
on your suggestions and objections, the performance advantage of LZO on
the Eee 901 dropped to 67 ms with the fast, and 54 ms with the safe
decompressor. Apparently almost half of the speed boost came from
skipping the checksumming.

At this point I don't think this idea is worth pursuing further, when
LZO is so close to gzip in performance after all.

But I want thank you for discussing this topic and taking my patch
submission seriously.

I hope I did not waste too much of your time and that I will be able to
contribute something more useful next time.

Thanks,
Andreas



  reply	other threads:[~2009-04-04 14:34 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-01 13:40 [PATCH 0/2] lib, initramfs: Add initramfs LZO compression Andreas Robinson
2009-04-01 13:40 ` [PATCH 1/2] lib: add fast lzo decompressor Andreas Robinson
2009-04-01 16:12   ` H. Peter Anvin
2009-04-01 19:22     ` Andreas Robinson
2009-04-01 20:55       ` H. Peter Anvin
2009-04-01 22:27         ` Andreas Robinson
2009-04-01 22:42           ` H. Peter Anvin
2009-04-01 23:11             ` Arjan van de Ven
2009-04-01 23:40               ` Nigel Cunningham
2009-04-02 12:30                 ` Andreas Robinson
2009-04-02 20:59                   ` Nigel Cunningham
2009-04-03 10:54                     ` Andreas Robinson
2009-04-03 11:48                       ` Nigel Cunningham
2009-04-03 12:53                         ` Andreas Robinson
2009-04-03 23:28                           ` Nigel Cunningham
2009-04-02  0:02               ` H. Peter Anvin
2009-04-02 12:13             ` Andreas Robinson
2009-04-02 14:30       ` John Stoffel
2009-04-03  9:49         ` Andreas Robinson
2009-04-03 18:35           ` H. Peter Anvin
2009-04-04 14:34             ` Andreas Robinson [this message]
2009-04-01 13:40 ` [PATCH 2/2] lib, initramfs: add support for LZO-compressed initramfs Andreas Robinson
2009-04-01 19:29 ` [PATCH 3/3] lib: enable lzo-compressed kernels Andreas Robinson

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