wow...
http://pastebin.com/raw.php?i=ihLLHyiT
$ time 7z a -mx=9 linux-2.6.37.tar.7z linux-2.6.37.tar; echo; time xz -9 -z linux-2.6.37.tar; echo; ls -lS
7-Zip 9.13 beta Copyright (c) 1999-2010 Igor Pavlov 2010-04-15
p7zip Version 9.13 (locale=en_US.utf8,Utf16=on,HugeFiles=on,2 CPUs)
Scanning
Creating archive linux-2.6.37.tar.7z
Compressing linux-2.6.37.tar
Everything is Ok
real 6m43.608s
user 10m1.092s
sys 0m3.957s
real 10m40.788s
user 10m33.363s
sys 0m2.106s
total 120264
-rw-rw-r--. 1 g g 61570448 Jan 22 15:42 linux-2.6.37.tar.xz
-rw-rw-r--. 1 g g 61567410 Jan 22 16:13 linux-2.6.37.tar.7z
$
--- On
Sat, 1/22/11, cornel panceac <cpanceac@xxxxxxxxx> wrote:
From: cornel panceac <cpanceac@xxxxxxxxx>
Subject: Re: Let's talk about compression rates
To: "CentOS mailing list" <centos@xxxxxxxxxx>
Date: Saturday, January 22, 2011, 10:55 AM
2011/1/22 S Mathias <smathias1972@xxxxxxxxx>
http://pastebin.com/raw.php?i=MwDnhknf
$ ls -Sl
total 461252
-rw-rw-r--. 1 g g 111709730 Jan 22 11:06 linux-2.6.37.zip
-rw-rw-r--. 1 g g 93174605 Jan 22 11:03 linux-2.6.37.tar.gz
-rw-rw-r--. 1 g g 73552510 Jan 22 11:10 linux-2.6.37.tar.bz2
-rw-rw-r--. 1 g g 66333786 Jan 22 11:16 linux-2.6.37.7z
-rw-rw-r--. 1 g g 64035788 Jan 22 11:16 linux-2.6.37.tar.7z
-rw-rw-r--. 1 g g 63480808 Jan 22 11:20 linux-2.6.37.tar.xz
$
I presume kernel.org knows this. Why doesn't people use e.g.: XZ?
This is the same as in PDF's. DJVU files could be amazing too. They could compress [convert] a 400 MByte PDF to a 20 MByte DJVU. Amazing.
Why don't these technologies spread??
most have no idea about that. do you know the level of compression used in .7z?
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