linux-kernel - Re: [PATCH] kconfig: update compression algorithm info

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Message-ID: <4F8EF9E3.7030801@zytor.com>
Date:	Wed, 18 Apr 2012 10:29:07 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
CC:	Lasse Collin <lasse.collin@...aani.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	qasdfgtyuiop <qasdfgtyuiop@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, alain@...ff.lu,
	albin.tonnerre@...e-electrons.com
Subject: Re: [PATCH] kconfig: update compression algorithm info

On 04/18/2012 10:23 AM, Markus Trippelsdorf wrote:
> 
> When btrfs will finally implement LZ4 compression this would be the obvious
> candidate for the fastest boot algo, because its decompression speed is
> amazing.
> 

Uh, no (and what does btrfs have to do with anything here?)

The issue is that the ratio of I/O speed to CPU can mean that a slower
decompression algorithm with better compression can still win,
time-wise, if your media is slow and your CPU is fast.

	-hpa

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