USER@PPC:~$ time gzip -c debian-40r0-powerpc-businesscard.iso > debian-40r0-powerpc-businesscard.iso.gz

real    0m31.169s
user    0m29.812s
sys     0m0.816s

USER@PPC:~$ time bzip2 -c debian-40r0-powerpc-businesscard.iso > debian-40r0-powerpc-businesscard.iso.bz2

real    2m6.239s
user    2m5.132s
sys     0m0.868s

USER@PPC:~$ time 7z a debian-40r0-powerpc-businesscard.iso.7z debian-40r0-powerpc-businesscard.iso

7-Zip 4.43 beta  Copyright (c) 1999-2006 Igor Pavlov  2006-09-15
p7zip Version 4.43 (locale=ja_JP.EUC-JP,Utf16=on,HugeFiles=on,1 CPU)
Scanning

Creating archive debian-40r0-powerpc-businesscard.iso.7z

Compressing  debian-40r0-powerpc-businesscard.iso

Everything is Ok

real    3m25.301s
user    3m23.936s
sys     0m1.028s

USER@PPC:~$ ls -l de*
-rwx------ 1 USER GROUP 73207808 2007-05-31 16:14 debian-40r0-powerpc-businesscard.iso
-rw-r--r-- 1 USER GROUP 57189030 2007-06-27 16:38 debian-40r0-powerpc-businesscard.iso.7z
-rw-r--r-- 1 USER GROUP 59288776 2007-06-27 16:32 debian-40r0-powerpc-businesscard.iso.bz2
-rw-r--r-- 1 USER GROUP 59298712 2007-06-27 16:29 debian-40r0-powerpc-businesscard.iso.gz

USER@PPC:~$ time gzip -c 1GB.img > 1GB.img.gz

real    5m11.507s
user    4m53.632s
sys     0m9.856s

USER@PPC:~$ time bzip2 -c 1GB.img > 1GB.img.bz

real    27m35.333s
user    27m20.396s
sys     0m10.940s

USER@PPC:~$ time 7z a 1GB.img.7z 1GB.img

7-Zip 4.43 beta  Copyright (c) 1999-2006 Igor Pavlov  2006-09-15
p7zip Version 4.43 (locale=ja_JP.EUC-JP,Utf16=on,HugeFiles=on,1 CPU)
Scanning

Creating archive 1GB.img.7z

Compressing  1GB.img                                                   98%

Everything is Ok

real    37m2.938s
user    36m30.968s
sys     0m13.364s

USER@PPC:~$ ls -l
合計 3256180
-rw-r--r-- 1 USER GROUP 1073741824 2007-06-27 16:46 1GB.img
-rw-r--r-- 1 USER GROUP  654801498 2007-06-27 18:26 1GB.img.7z
-rw-r--r-- 1 USER GROUP  672959084 2007-06-27 17:27 1GB.img.bz
-rw-r--r-- 1 USER GROUP  680517298 2007-06-27 16:59 1GB.img.gz
-rwx------ 1 USER GROUP   73207808 2007-05-31 16:14 debian-40r0-powerpc-businesscard.iso
-rw-r--r-- 1 USER GROUP   57189030 2007-06-27 16:38 debian-40r0-powerpc-businesscard.iso.7z
-rw-r--r-- 1 USER GROUP   59288776 2007-06-27 16:32 debian-40r0-powerpc-businesscard.iso.bz2
-rw-r--r-- 1 USER GROUP   59298712 2007-06-27 16:29 debian-40r0-powerpc-businesscard.iso.gz
drwxr-xr-x 2 root root       4096 2007-06-27 16:40 junk
drwx------ 2 USER GROUP       4096 2007-06-27 16:27 新しいフォルダ
USER@PPC:~$