Date: Sat, 19 May 2007 20:12:15 +0200
Message-Id: <1799168144@web.de>
MIME-Version: 1.0
From: devzero@web.de
To: khc@pm.waw.pl
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] LZO1X de/compression support
Organization: http://freemail.web.de/
Content-Type: text/plain; charset=iso-8859-15
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1633
Lines: 37

>I'm certainly missing something but what are the advantages of this
>code (over current gzip etc.), and what will be using it?

lzo compresses/decompresses much faster and using less cpu

this is how it compares:

bzip2:  best compression, but damn slow performance
gzip: good compression with good performance
lzo:  not that good compression but stunning performance 

reiser4 and compressed caching is alrady using lzo compression, but they bring their own implementation - there are other projects which could make use of it - so it`s better to share the code by making it an integral part of the kernel.

roland

> Facts for LZO (at least for original code. Should hold true for this
> port also - hence the RFC!):
> - The compressor can never overrun buffer.
> - The "non-safe" version of decompressor can never overrun buffer if
> compressed data is unmodified. I am not sure about this if compressed
> data is malicious (to be confirmed from the author).
> - The "safe" version can never crash (buffer overrun etc.) - confirmed
> from the author.

I'm certainly missing something but what are the advantages of this
code (over current gzip etc.), and what will be using it?
-- 
Krzysztof Halasa
_______________________________________________________________
SMS schreiben mit WEB.DE FreeMail - einfach, schnell und
kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/