Re: [PATCH 3/5] Add support for LZO-compressed kernels

[H. Peter Anvin]

kevin.granade@xxxxxxxxx wrote:
>  >
>  > So for a compression ratio that is still relatively close to gzip, it's
>  > much faster to extract, at least in that case.
>
> Is that "time to run the extraction algorithm", or "time to read in 
> image from media and extract"? I think the time to read from the media 
> would tend to dominate the decompression time.
> Either way, could you provide the other time for each algorithm in order 
> to give a sense of how this might scale to other CPU speeds/media read 
> speeds?

If you have very slow media, you probably want to use LZMA.  If you have 
a very slow CPU and comparatively fast media, LZO might be a good 
option... I have heard people asking for *uncompressed* kernels for this 
reason, but LZO runs at a significant fraction of memcpy() speed.

	-hpa
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