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From: Daniel Hazelton <dhazelton@enter.net>
To: "Nitin Gupta" <nitingupta910@gmail.com>
Cc: "Bret Towe" <magnade@gmail.com>,
	lkml <linux-kernel@vger.kernel.org>,
	linux-mm-cc@laptop.org,
	linuxcompressed-devel@lists.sourceforge.net,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Richard Purdie" <richard@openedhand.com>,
	"Satyam Sharma" <satyam.sharma@gmail.com>
Subject: Re: [RFC] LZO de/compression support - take 6
Date: Tue, 29 May 2007 19:32:03 -0400	[thread overview]
Message-ID: <200705291932.04255.dhazelton@enter.net> (raw)
In-Reply-To: <4cefeab80705282258p570c649aja5a60b82f63c2440@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 933 bytes --]

I just noticed a bug in my testbed/benchmarking code. It's fixed, but I 
decided to compare version 6 of the code against the *unsafe* decompressor 
again. The results of the three runs I've put it through after changing it to 
compare against the unsafe decompressor were startling. `Tiny's` compressor 
is still faster - I've seen it be rated up to 3% faster. The decompressor, 
OTOH, when compared to the unsafe version (which is the comparison that 
started me on this binge of hacking), is more than 7% worse. About 11% slower 
on the original test against a C source file, and about 6% slower for random 
data. However, looking at the numbers involved, I can't see a reason to keep 
the unsafe version around - the percentages look worse than they are - from 1 
to 3 microseconds. (well, the compressed-cache people might want those extra 
usecs - but the difference will never be noticeable anywhere outside the 
kernel)

DRH

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  parent reply	other threads:[~2007-05-29 23:32 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-28 14:34 [RFC] LZO de/compression support - take 6 Nitin Gupta
2007-05-28 14:40 ` Nitin Gupta
2007-05-28 14:49   ` Daniel Hazelton
2007-05-28 15:06     ` Nitin Gupta
2007-05-28 15:43       ` Adrian Bunk
2007-05-28 16:03         ` Nitin Gupta
2007-05-28 17:11           ` Adrian Bunk
2007-05-28 19:59             ` Daniel Hazelton
2007-05-28 20:18             ` Daniel Hazelton
2007-05-28 20:52               ` Daniel Hazelton
2007-05-29  5:55             ` Nitin Gupta
2007-05-29  8:08             ` Michael-Luke Jones
2007-05-29 11:40               ` Adrian Bunk
2007-05-29 12:03                 ` Nitin Gupta
2007-05-29 13:13                   ` Daniel Hazelton
2007-05-29 21:10             ` Jan Engelhardt
2007-05-29 21:26               ` Adrian Bunk
2007-05-30  5:31                 ` Nitin Gupta
2007-05-30 13:56                   ` Johannes Stezenbach
2007-05-30 14:24                     ` Satyam Sharma
2007-05-28 15:30   ` Adrian Bunk
2007-05-28 15:47     ` Nitin Gupta
2007-05-28 15:55       ` Daniel Hazelton
2007-05-28 17:01         ` Adrian Bunk
2007-05-28 19:51           ` Daniel Hazelton
2007-05-28 15:49     ` Daniel Hazelton
2007-05-28 22:57   ` Bret Towe
2007-05-29  5:48     ` Nitin Gupta
2007-05-29 13:09       ` Daniel Hazelton
2007-05-28 22:53 ` Bret Towe
2007-05-28 22:58   ` Bret Towe
2007-05-29  5:58   ` Nitin Gupta
2007-05-29 20:14     ` Daniel Hazelton
2007-05-29 20:33       ` Daniel Hazelton
2007-05-29 21:48         ` Daniel Hazelton
2007-05-29 23:32     ` Daniel Hazelton [this message]
2007-05-30  5:19       ` Nitin Gupta
2007-05-29  8:17 ` Makefile question (was [RFC] LZO de/compression support - take 6) Michael-Luke Jones
2007-05-29 10:41   ` Satyam Sharma
2007-05-29 10:51     ` Michael-Luke Jones
2007-05-29 11:27       ` Satyam Sharma
2007-05-29 13:33         ` JFFS2 using 'private' zlib header " Michael-Luke Jones
2007-05-29 13:43           ` Daniel Hazelton
2007-05-29 15:15             ` Satyam Sharma
2007-05-29 16:20               ` Daniel Hazelton
2007-05-30  5:31               ` Mark Adler
2007-05-30 13:05                 ` Daniel Hazelton
2007-05-30 13:30                 ` Satyam Sharma
2007-05-30 23:02                   ` Mark Adler
2007-05-30 23:26                     ` Daniel Hazelton
2007-06-01  3:06                     ` Daniel Hazelton
2007-06-01 17:24                       ` Satyam Sharma
2007-05-30 13:41               ` Artem Bityutskiy
2007-05-30 15:46                 ` Artem Bityutskiy
2007-05-30 16:12                   ` Satyam Sharma
2007-05-30 16:43                     ` Artem Bityutskiy
2007-05-29 20:48 ` [RFC] LZO de/compression support - take 6 Jan Engelhardt
2007-05-30  5:54   ` Nitin Gupta
2007-05-30  8:31     ` Jan Engelhardt
2007-05-30 10:47       ` Nitin Gupta
2007-05-31 12:34 ` Nitin Gupta
2007-05-31 18:21   ` Satyam Sharma

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