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Date:      Tue, 6 Feb 2001 20:55:28 -0500 (EST)
From:      mi@aldan.algebra.com
To:        Luigi Rizzo <rizzo@aciri.org>
Cc:        Jordan Hubbard <jkh@winston.osd.bsdi.com>, obrien@FreeBSD.org, sheldonh@uunet.co.za, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: bzip2 (was cvs commit: ...)
Message-ID:  <200102070155.f171tTP58669@misha.privatelabs.com>
In-Reply-To: <200102062313.f16NDus45358@iguana.aciri.org>

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On  6 Feb, Luigi Rizzo wrote:
= > > Bzip2 has a  more liberal license and is a  better (more efficient
= > > usually) compressor.  It is  also being actively  maintained. Some
= > > Linux distros come with man-pages bzip2-ed instead of gzip-ed too.
= > > IMHO, we should use it.
=
= my understanding  is that bzip* is  _way_ slower than gzip  due to the
= algorithm used. Unless  we really care the 5-10% savings  in size, i'd
= rather  _not_  use  it,  for portability  and  backward  compatibility
= reasons.

My testing showed the opposite, actually. See:
	 http://virtual-estates.net/bm/

= > Does bzip  offer any backwards  compatability with gzip, e.g.  if we
= > bundled bzip in  /usr/bin instead of gzip, would a  hardlink to bzip
= > under the name "gzip" still DTRT with .gz files?

No. We will either need both, or have our own de-archiver, that will use
either libbz2 or libz  to DTRT. What is the need  to replace rather than
add?

	-mi




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