Re: Transparent compression in the FS

From: Ville Herva
Date: Thu Oct 16 2003 - 03:06:41 EST


On Wed, Oct 15, 2003 at 11:36:24PM +0200, you [Tomas Szepe] wrote:
> On Oct-15 2003, Wed, 16:27 +0200
> Erik Mouw <erik@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
> > You have a point, but remember that modern IDE drives can do about
> > 50MB/s from medium. I don't think you'll find a CPU that is able to
> > handle transparent decompression on the fly at 50MB/s ... [snip]
>
> You may want to check out LZO performance on a recent CPU.
> http://www.oberhumer.com/opensource/lzo/

Out of interest:

Celeron 1.4GHz, a source tar:

compr MB/s uncompr MB/s ratio
lzo -m71: 58.2 170.2 24.4%
lzo -m972: 2.7 100.8 17.7%

gzip -1: 13.6 115.7 22.1%
gzip -6: 8.8 121.8 17.7%
gzip -9: 4.5 79.8 17.6%

lzo used assembler versions.


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