Recompressing knits

John Arbash Meinel john at
Sat Sep 2 00:22:14 BST 2006

Jan Hudec wrote:
> On Sat, Aug 26, 2006 at 01:33:50PM -0500, John Arbash Meinel wrote:
>> [...]
>> 2) Using a different algorithm, we can get as good as 176/14 = 12.5:1
>> compression. I *really* wish that there was a nice LZMA package, because
>> I think it embodies some really good tradeoffs for bzr. (It takes longer
>> to compress than bzip2, but it can decompress almost as fast as gzip).
> Well, I just briefly looked at the p7zip program (unix port of 7zip).
> It seems to be very modular. The package contains seaprate shared
> library for each compression method and for each file format. With a bit
> of python.boost-fu bindings should be doable.
>> [...]

Good to hear. The only thing I would be concerned about, is that there
is also a 7za program. And I believe one of the archive formats is not
compatible with the other one. If I read correctly, it was because one
of them wanted to be able to stream compress like gzip and bzip2 can
(read from stdin, write to stdout), which I guess isn't possible in the
standard .7z file format.

Also, it was unclear if the unix tools in general were compatible with
the windows 7zip format. Though p7zip sounds like they would be making
that a priority.


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