[PATCH 1/3] Add the snappy-c compressor to lib
Matthieu CASTET
matthieu.castet at parrot.com
Tue Nov 22 12:23:44 EST 2011
Mark Brown a écrit :
> On Thu, Nov 17, 2011 at 11:36:17PM +0200, Artem Bityutskiy wrote:
>
>> Yeah, of course it would be interesting to see. If snappy is a win-win
>> on ARM, we should merge it.
>
> It might be interesting to use it for the compressed cache type in regmap
> as well.
>
For info we did some bench mark on omap3 (cortexa-8) for decompressing
hibernation image.
And snappy was a lose-lose against lzf (bigger compressed result, slower to
decompress) :
algo : compressed size , time to decompress
snappy (16 and 32 bits unaligned access done by hardware) : 45Mo, 3.5 s
snappy (unaligned access done by software) : 45Mo, 2.50 s
lzf (unalign access done by softare) : 40Mo, 2.35 s
Of course this is against one pattern (hibernation image) and benchmark should
be done on other patterns.
Matthieu
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