linux-kernel - Re: [RFC] LZO de/compression support

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Message-ID: <4cefeab80705280246i7c0a3d43j90f6dddf197bb9b5@mail.gmail.com>
Date:	Mon, 28 May 2007 15:16:59 +0530
From:	"Nitin Gupta" <nitingupta910@...il.com>
To:	"Daniel Hazelton" <dhazelton@...er.net>
Cc:	"Satyam Sharma" <satyam.sharma@...il.com>,
	"Richard Purdie" <richard@...nedhand.com>,
	linux-kernel@...r.kernel.org, linux-mm-cc@...top.org,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Andrey Panin" <pazke@...pac.ru>, "Bret Towe" <magnade@...il.com>,
	"Michael-Luke Jones" <mlj28@....ac.uk>
Subject: Re: [RFC] LZO de/compression support - take 4

On 5/28/07, Daniel Hazelton <dhazelton@...er.net> wrote:
> On Monday 28 May 2007 05:08:54 Nitin Gupta wrote:
> > On 5/28/07, Daniel Hazelton <dhazelton@...er.net> wrote:
> > > On Monday 28 May 2007 04:37:04 Nitin Gupta wrote:
> > > > On 5/28/07, Daniel Hazelton <dhazelton@...er.net> wrote:
>
> New testbed based on minilzo complete.
> Results from run using 1000 runs to generate averages:
> 1000 run averages:
> 'Tiny LZO':
>         Combined: 55.196 usec
>         Compression: 37.132 usec
>         Decompression: 18.064 usec
> 'miniLZO':
>         Combined: 55.785 usec
>         Compression: 40.862 usec
>         Decompression: 14.923 usec
>

Great!

I believe its now ready for mainline. We can do further cleanups and
optimizations there - more users of this code will surely drive more
enhancements.

> (using (tiny/full)/100 for percentages:
> 'Tiny' is 0.9% faster on average


I think this is more appropriate: [(full-tiny)/full]*100
=> tiny is ~1% faster on average.


> Same for the Compression
> 'safe' decompressor from tiny is 1.2% slower than unsafe from minilzo)
>

This is expected :)


Cheers,
Nitin
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