[Bug 958792] Re: thunderbird deb archives should use lzma compression

[Jérôme]

This bug still occurs with 16.0.2+build1-0ubuntu0.12.10.1 version.

Below you see that xz saves 19% of archive size compared to gzip :
--------------
j at j-VB:~$ 7z l /var/cache/apt/archives/thunderbird_16.0.2+build1-0ubuntu0.12.10.1_amd64.deb | grep data
Path = data.tar.gz
Path = data.tar.gz
                    .....     49664000     22364697  data.tar
j at j-VB:~$ 7z x /var/cache/apt/archives/thunderbird_16.0.2+build1-0ubuntu0.12.10.1_amd64.deb 

7-Zip [64] 9.20  Copyright (c) 1999-2010 Igor Pavlov  2010-11-18
p7zip Version 9.20 (locale=fr_FR.UTF-8,Utf16=on,HugeFiles=on,1 CPU)

Processing archive:
/var/cache/apt/archives/thunderbird_16.0.2+build1-0ubuntu0.12.10.1_amd64.deb

Extracting  data.tar

Everything is Ok

Size:       49664000
Compressed: 22368922
j at j-VB:~$ gzip -c --best data.tar > data.tar.gz
j at j-VB:~$ xz -c -9e data.tar > data.tar.xz
j at j-VB:~$ ls -lk data.tar*
-rw-rw-r-- 1 j j 48500 oct.  30 02:33 data.tar
-rw-rw-r-- 1 j j 21826 nov.   1 12:38 data.tar.gz
-rw-rw-r-- 1 j j 17621 nov.   1 12:39 data.tar.xz
j at j-VB:~$
------------

Note that the decompression duration of a xz archive is slightly the
same that a gzip archive.

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https://bugs.launchpad.net/bugs/958792

Title:
  thunderbird deb archives should use lzma compression

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