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From: robjung@world.std.com (Robert K Jung)
Newsgroups: comp.compression
Subject: ARJ 2.00 file archiver
Message-ID: <1991Apr20.052556.3247@world.std.com>
Date: 20 Apr 91 05:25:56 GMT
Organization: The World Public Access UNIX, Brookline, MA
Lines: 23


 
Concerning the capabilities of the new ARJ 2.00 release, there are a
few facts that should be clarified.  ARJ 2.00 has two compression
methods.  Each has been designed to compete against a particular
product.
 
ARJ -m1 (the default) typically provides better compression and better
speed than LHA 2.1x.  ARJ -m2 provides better compression and slightly
slower speed than PKZIP 1.10.  On average, ARJ -m2 is slightly slower
than PKZIP 1.10.  On databases and formatted user manuals, ARJ -m2 is
often faster than PKZIP.  On binary files and runfiles, ARJ -m2 is
significantly slower than PKZIP.
 
ARJ has been designed with a general purpose compression algorithm.
Since PKZIP's compressor is pre-computed and tailored to IBM PC
data, it will be very difficult to build a general compressor to
match PKZIP's speed on compression and extraction.
 
The main goals of ARJ are to provide as much practical compression as
is possible on an IBM PC machine and as many features as practical.
 
robjung@world.std.com (Robert K Jung)