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- Xref: sparky comp.sys.atari.st:13413 comp.sys.atari.st.tech:4716
- Newsgroups: comp.sys.atari.st,comp.sys.atari.st.tech
- Path: sparky!uunet!cs.utexas.edu!torn!cunews!csi.uottawa.ca!kwhite
- From: cbbrowne@csi.uottawa.ca (Christopher Browne)
- Subject: Re: ZOO/ZIP/ARC/LZH
- Message-ID: <1992Sep8.153531.11332@csi.uottawa.ca>
- Sender: kwhite@csi.uottawa.ca (Keith White)
- Nntp-Posting-Host: prgv
- Organization: Dept. of Computer Science, University of Ottawa
- References: <1992Sep1.014304.22255@actrix.gen.nz> <8eck4=200awJAJJIFk@andrew.cmu.edu> <1117@usdtsg.DaytonOH.NCR.COM>
- Date: Tue, 8 Sep 92 15:35:31 GMT
- Lines: 43
-
- In article <1117@usdtsg.DaytonOH.NCR.COM> anisko@usdtsg.UUCP () writes:
- >In article <8eck4=200awJAJJIFk@andrew.cmu.edu> sm86+@andrew.cmu.edu (Stefan Monnier) writes:
- >>You can use different weighting for the importance of speed
- >>compared to size ! Of course, LHarc is the worse if time is important
- >>as it always uses a slow but quite efficient algo.
- >>If size is more important, on the other hand, it will be 2nd !
- >
- > At least to me, compression is the important thing. It may take a
- >-little- longer to compress or decompress a file, but when you are
- >downloading it long distance or off one of the services (like GEnie) then
- >the compression saves you some money (particularly over the long run).
-
- By and large, compression IS the important thing. How often do you
- compress/decompress any given archive? Not ALL that often, I'd
- expect. If you actually USE a program enough times to make it worth
- downloading, it's certainly going to be enough times to obscure the
- extra 10 seconds it might take to decompress the archive.
-
- And when MANY users are using a given archive, it's better to have it
- shorter rather than longer. People may be paying money for each K
- downloaded, or they may be using a slow line to transmit data, and in
- these cases, the inferior size would outweigh any savings in time from
- a faster decompress...
-
- You might save 20 seconds, and the size might degrade by 60K on a
- large archive.
-
- But guess what? At 2400 baud, it takes 2-3 minutes to download that
- extra 60K. Hmmmm... The net effect looks like a LOSS of 2 minutes to
- me...
-
- Plus, you may wind up PAYING for that extra 60K. Save 20 seconds, but
- pay $3 for it. Your time would have to be worth $540 per hour in
- order to save money this way...
-
- In short, the higher the compression, the better. If it costs SOME
- time, so be it. It's probably worth it...
-
- --
- Christopher Browne
- cbbrowne@csi.uottawa.ca
- University of Ottawa
- Master of System Science Program
-