davidsen@steinmetz.ge.com (Wm. E. Davidsen Jr) (04/13/89)
I was playing with some compression methods and got the following
results when compressing an old (apr 4 1986) version of qmodem.
filesize how I got it
227297 Sum of the sizes of the original files
150325 Arc file as sent to me
138582 Zoo of the original files
135785 Zoo f (no compression) of the original files,
followed by 16 bit compress
110887 Zoo f of original files followed by compression
with LZHUF program
109849 Compressed all files with LZHUF then did a zoo f
to store them. Note that this doesn't preserve
the modified date/time or permissions
I conclude the following:
1) there is no major penalty for using 13 bit zoo instead of 16 bit
compress, at least on this set of mixed binary and text files.
2) there is no benifit to be gained for compressing all of the files at
once for this data set.
3) LZHUF produced far better compression than anything else I've tried.
4) LZHUF is too slow for normal use, but is perfect for archival storage.
--
bill davidsen (wedu@crd.GE.COM)
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"Stupidity, like virtue, is its own reward" -me