F21 System Wide Change: lbzip2 as default bzip2 implementation

[Susi Lehtola]

On Fri, 4 Apr 2014 12:49:25 -0400
Matthew Miller <mattdm at fedoraproject.org> wrote:
> On Fri, Apr 04, 2014 at 04:15:59PM +0200, Mikolaj Izdebski wrote:
> > "lbzip2 -u" always produced smallest files (even smaller than bzip2)
> > while consuming the least amount of resources (CPU power and memory).
> > This directly translates to lowest bills in cloud, which makes "lbzip2
> > -u" the best choice here.
> 
> But... the size difference in your test cases appear to be 0.1% and
> 0.02%. Am I reading that right? And, compressing linux-3.12.6.tar with xz
> instead of bzip2 gives a 15.6%, or with xz -9, 19.7%. Of course, that's very
> slow, and the other resource factors are important too. (And lbzip2 is
> impressively fast.)

Well, looking at the table, I calculate size differences of -0.10% and
-0.14% for lbzip2 and lbzip2 -u, respectively, compared to bzip2 for
compression of payload.tar.

.. and -0.31% and -0.02% for linux-3.12.6.tar.
-- 
Susi Lehtola
Fedora Project Contributor
jussilehtola at fedoraproject.org