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Re: [Monotone-devel] Re: zlib vs gzip

From: Zack Weinberg
Subject: Re: [Monotone-devel] Re: zlib vs gzip
Date: Wed, 31 Oct 2007 08:00:11 -0700

On Oct 31, 2007 2:26 AM, Markus Schiltknecht <address@hidden> wrote:
> Eric Anderson wrote:
> > If you want fast compression, the best I know of is lzf
> > (
> Thanks for the pointer, that sounds interesting. What type of
> compression is it? A LZ77 variant? With a dictionary?

It looks like it's pure LZ77 - I'm not sure what you mean by 'with a
dictionary', but there's no Huffman-coding stage as there is in

I'd like to point out that the #1 easiest thing anyone could do right
now to speed up monotone is get hand-optimized assembly SHA1
implementations into our copy of botan.  That one function shows up as
at least 7% of runtime every single time I profile it, doesn't matter
what the task is.


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