Path: utzoo!attcan!uunet!unsvax!jimi!brownie.cs.unlv.edu!maniac
From: maniac@brownie.cs.unlv.edu (Eric J. Schwertfeger)
Newsgroups: comp.sys.amiga
Subject: Re: Lharc is no good.
Message-ID: <2087@jimi.cs.unlv.edu>
Date: 16 Oct 90 00:06:13 GMT
References: <JITA.90Oct4183102@polaris.utu.fi> <3377@corpane.UUCP> <5037@crash.cts.com> <9129@helios.TAMU.EDU>
Sender: news@jimi.cs.unlv.edu
Reply-To: maniac@brownie.cs.unlv.edu (Eric J. Schwertfeger)
Organization: UNLV Computer Science and Electrical Engineering
Lines: 17

In article <9129@helios.TAMU.EDU>, n074ev@tamuts.tamu.edu (Christopher Walton) writes:
) Zip does have a superior crunching algorith, considering it has lzhuf built
) in as well as thier own modifications....  I would even say it is better than
) LHArc... 

	Not Quite.  I ported a CLI based unzip program to the Amiga, so I
got a good long look at the source code.  LZ-Huffman, which is what LHArc 
uses, is not present.  PKZip does, however have LZW, which is the same type
of compression ZOO uses.
	Actually, I wasn't too impressed with the best ZIP compression
mode (forgot it's name, been too long), not because it wasn't efficient,
but because I saw a few *EASY* ways to improve on it.
	ZIP tends to do about as well as LHArc on most files, except that
on a file that niether can compress much, ZIP usually does worse.

-- 
Eric J. Schwertfeger, maniac@jimi.cs.unlv.edu