Re: [Bug-tar] GNU tar 1.20

[Kevin Day]

On Wed, Sep 10, 2008 at 10:15 AM, Antonio Diaz Diaz <address@hidden> wrote:
> Eric Blake wrote:
>>
>> It seems a bit ironic to add LZMA support but not offer tar-1.20.tar.lzma
>> on the ftp site :)
>
> Just in case you are thinking about releasing a LZMA compressed tar package,
> perhaps you would like to know there exists a much simplified LZMA
> compressor/decompressor program and format (only eight source files
> including two from the command line argument parser) featuring magic bytes,
> streaming, integrity checking, 64-bit file size support and an user
> interface almost identical to the one of bzip2.
>
> Its name is lzip, and you can download it from here
> http://freshmeat.net/projects/lzip/
>
>
For the record, LZIP has a different binary header.
Instead of LZMA's "\xFFLZMA", it seems to only have: "LZIP"
I imagine that would be another patch.

Here are it's times relative to bzip2, gzip, and lzop (lzip has a
scary 9minute compression time):
# ls -lh linux-2.6.26.3-olpc.tar
-rw-r----- 1 turtle turtle 514M Sep 10 02:38 linux-2.6.26.3-olpc.tar

# time lzop linux-2.6.26.3-olpc.tar
real    0m6.028s
user    0m5.163s
sys     0m0.487s

# time ~/lzip-0.2/lzip linux-2.6.26.3-olpc.tar
real    9m51.312s
user    9m49.965s
sys     0m0.950s

# time gzip linux-2.6.26.3-olpc.tar
real    0m33.023s
user    0m32.461s
sys     0m0.497s

# time bzip2 linux-2.6.26.3-olpc.tar
real    2m2.926s
user    2m2.005s
sys     0m0.800s

# ls -lh
-rw-r----- 1 turtle turtle  75M Sep 10 02:38 linux-2.6.26.3-olpc.tar.lz
-rw-r----- 1 turtle turtle 198M Sep 10 02:38 linux-2.6.26.3-olpc.tar.lzo
-rw-r----- 1 turtle turtle 142M Sep 10 02:38 linux-2.6.26.3-olpc.tar.gz
-rw-r----- 1 turtle turtle 111M Sep 10 02:38 linux-2.6.26.3-olpc.tar.bz2

# time lzop -d linux-2.6.26.3-olpc.tar.lzo
real    0m13.576s
user    0m2.087s
sys     0m1.103s

# time ~/lzip-0.2/lzip -d linux-2.6.26.3-olpc.tar.lz
real    0m16.444s
user    0m13.639s
sys     0m1.087s

# time gzip -d linux-2.6.26.3-olpc.tar.gz
real    0m14.715s
user    0m5.220s
sys     0m1.070s

# time bzip2 -d linux-2.6.26.3-olpc.tar.bz2
real    0m28.186s
user    0m26.595s
sys     0m1.353s


-- 
Kevin Day