Bug#569917: Support base.tar.xz/bz2 as well as tgz

[Tino Keitel]

On Tue, Nov 29, 2011 at 21:32:24 +0900, Junichi Uekawa wrote:
> Hi,
> 
> Heh, thanks for the patch.
> I don't know how really it makes things fast, but it probably doesn't hurt.

Just 2 examples from my setup: pbuilder --update takes 16 seconds with
the default (gzip), and 6 seconds with pigz on my quadcore. The
base tar for sid/amd64 takes 91 MB with gzip, and 60 MB with xz.

> I assume --use-compress-program has been available for tar since forever?

I saw this first many years ago, at least in GNU tar. I'll see if I can
get some exact numbers.

Regards,
Tino