Your message dated Tue, 3 Apr 2012 07:26:09 +0200
with message-id <[email protected]>
and subject line Re: Bug#652636: dpkg-dev - Uses, or at least documents, xz -6
by default
has caused the Debian Bug report #652636,
regarding dpkg-dev - Uses, or at least documents, xz -6 by default
to be marked as done.
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652636: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=652636
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--- Begin Message ---
Package: dpkg-dev
Version: 1.16.1.2
Severity: normal
dpkg-deb uses the -6 preset of xz by default, or at least documents it
this way. According to xz(1), this mode needs 9MiB of memory for
decompression (and 94MiB for compression).
This should be no problem for most mainstream arches. However for arches
like mips*, arm* and m68k, where a lot of systems out there only have
very limited memory, this may be a large burden.
I'd like to use xz for the Linux kernel packages. This saves 30% of size
with neglectable changes in decompression time.
I think it may be a good idea to only use -3 for this arches. This
reduces the memory requirements to 3 and 32MiB, while the result is
still 20% smaller then the package compressed with gz.
Bastian
--
Earth -- mother of the most beautiful women in the universe.
-- Apollo, "Who Mourns for Adonais?" stardate 3468.1
--- End Message ---
--- Begin Message ---
Hi,
On Mon, 2011-12-19 at 15:24:47 +0100, Bastian Blank wrote:
> Package: dpkg-dev
> Version: 1.16.1.2
> Severity: normal
>
> dpkg-deb uses the -6 preset of xz by default, or at least documents it
> this way. According to xz(1), this mode needs 9MiB of memory for
> decompression (and 94MiB for compression).
>
> This should be no problem for most mainstream arches. However for arches
> like mips*, arm* and m68k, where a lot of systems out there only have
> very limited memory, this may be a large burden.
>
> I'd like to use xz for the Linux kernel packages. This saves 30% of size
> with neglectable changes in decompression time.
>
> I think it may be a good idea to only use -3 for this arches. This
> reduces the memory requirements to 3 and 32MiB, while the result is
> still 20% smaller then the package compressed with gz.
The default is not going to change depending on the architecture. If
the current default is not appropriate for your package you can always
explicitly change that with the -z option, in addition there's now a
new -S option that might also interest you.
In any case closing this now.
thanks,
guillem
--- End Message ---
