compressing mostly textfiles
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

$ which tarbz2
tarbz2 is aliased to `/bin/tar --bzip2 -cvpf'

$ which targz
targz is aliased to `/bin/tar -cvzpf'




$ du --max-depth=1 -k | grep delta
108444  ./delta


$ time tarbz2 delta.tar.bz2 delta/
real    0m48.591s
user    0m38.234s
sys     0m0.524s

$ ls -lk delta.tar.bz2
-rw------- 1 USER USER 65152 17.12.2007 14:48 delta.tar.bz2



$ time tar cf - delta/  |  7za  a  -si  delta.tar.7z
real    1m1.577s
user    0m59.928s
sys     0m0.448s

$ ls -lk delta.tar.7z
-rw------- 1 USER USER 13977 17.12.2007 14:56 delta.tar.7z


$ time tar cf - delta/ | 7za a -si -m0=lzma delta-lzma.tar.7z
real    1m1.268s
user    0m59.936s
sys     0m0.404s

$ ls -lk delta-lzma.tar.7z
-rw------- 1 USER USER 13977 17.12.2007 14:58 delta-lzma.tar.7z


$ time targz delta.tar.gz delta/
real    0m11.449s
user    0m10.213s
sys     0m0.292s

$ ls -lk delta.tar.gz
-rw------- 1 USER USER 66371 17.12.2007 14:59 delta.tar.gz








extracting mostly textfiles
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

$ which untarbz2
untarbz2 is aliased to `/bin/tar --bzip2 -xvpf'

$ which untargz
untargz is aliased to `/bin/tar -xvzpf'




$ time untarbz2 delta.tar.bz2
real    0m20.017s
user    0m18.173s
sys     0m0.824s

$ du --max-depth=1 -k
108444  ./delta



$ time untargz delta.tar.gz
real    0m8.205s
user    0m1.856s
sys     0m0.420s

$ du --max-depth=1 -k
108444  ./delta


$ time 7za x -so delta.tar.7z | tar xf -
real    0m5.030s
user    0m3.136s
sys     0m0.452s

$ du --max-depth=1 -k
108444  ./delta