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List:       busybox
Subject:    gzip versus lzop
From:       "Michael D. Setzer II" <mikes () kuentos ! guam ! net>
Date:       2010-02-18 14:01:31
Message-ID: 4B7D483B.26613.2AE379 () mikes ! kuentos ! guam ! net
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With the discussion on gzip I was wonder how this relates to lzop.
I am the maintainer of the g4l project that uses both gzip and lzop.
lzop is the default compression, and I use the busybox version since I 
noticed no speed difference from the external version. On the other hand, 
some users reported a big difference in using the busybox gzip compared 
with the external program. 

In a test of the compression as backing up a small boot partition of 200M I 
got the following results.
3 seconds for lzop
6 seconds for gzip
10 seconds for no compression
18 seconds for bzip2

lzop image was about 10% larger than gzip.

Doing a full 80GB disk image,
lzop took about 50 minutes
gzip took about 1 hour 40 minutes

Also, noted that gzip had very high CPU number 80 to 90%, while lzop was 
about 30%. Again, the image was about 10% larger with lzop.

Note: uncompression  speed resulted in about same speeds between lzop 
and gzip.

Not sure how the sizes of gzip and lzop in busybox compare or if there is any 
license issues?

Thanks
+----------------------------------------------------------+
  Michael D. Setzer II -  Computer Science Instructor      
  Guam Community College  Computer Center                  
  mailto:mikes@kuentos.guam.net                            
  mailto:msetzerii@gmail.com
  http://www.guam.net/home/mikes
  Guam - Where America's Day Begins                        
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