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Re: xz for the new release tip

From: Ralf Corsepius <ralf dot corsepius at rtems dot org>
To: Mark Kettenis <mark dot kettenis at xs4all dot nl>
Cc: jan dot kratochvil at redhat dot com, gdb at sourceware dot org
Date: Thu, 01 Oct 2009 08:27:12 +0200
Subject: Re: xz for the new release tip
References: <20090930202857.GA32600@host0.dyn.jankratochvil.net> <200910010619.n916JCCc020880@brahms.sibelius.xs4all.nl>

On 10/01/2009 08:19 AM, Mark Kettenis wrote:

Date: Wed, 30 Sep 2009 22:28:57 +0200
From: Jan Kratochvil<jan.kratochvil@redhat.com>

Hi,

while currently the sources are release both as .tar.gz and as .tar.bz2 would
not it be worth to start using .xz as a replacement for the .bz2 variant?

13406892 bytes: gdb-6.8.91.20090930.tar.xz  (xz -9)
xz -dc:    real	0m1.226s user	0m1.190s sys	0m0.037s

18453837 bytes: gdb-6.8.91.20090930.tar.bz2
bzip2 -dc: real	0m3.775s user	0m3.755s sys	0m0.019s


Never heard of it, so my guess it isn't used widely enough yet to make
sense.

Well, zz is the successor of lzma.

It's supported as "dist compression" by modern autoconf's (autoconf-2.64), it's the internal compression being used in rpm on modern Linux distros (Fedora, openSUSE), etc.

Whether it's stable enough and has a longer term perspective is a different question or will prove to be a yet another temporary anecdote in compression tools is hard to tell - doubts are justified, IMHO.

Ralf

Follow-Ups:
- Re: xz for the new release tip
  - From: Ralf Corsepius
- Re: xz for the new release tip
  - From: Jan Kratochvil

References:
- Re: xz for the new release tip
  - From: Mark Kettenis

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