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

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Message-ID: <20120418173649.GB6165@x4>
Date:	Wed, 18 Apr 2012 19:36:49 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	"H. Peter Anvin" <hpa@...or.com>
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 2012.04.18 at 10:29 -0700, H. Peter Anvin wrote:
> 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?)

I was referring to a possible library implementation.

> 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.

Sure. Only measurements will tell...

-- 
Markus
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