w8sdz@WSMR-SIMTEL20.ARMY.MIL (Keith Petersen) (02/17/89)
[--forwarded message--]
From: "Leslie C. Brown" <lbrown@BRL.MIL>
Re: pkzip
I've uploaded PKWare's new ZIP archiver PKZ090.EXE to Simtel20. I did
a couple of comparison tests on the same file YAMDEMO.EXE.
PKPAK used squashing with a 30% reduction
PKZIP with default was also 30% reduction.
PKZIP with factor 3 gave 40% reduction
PKZIP with factor 4 gave 41% reduction.
I didn't do any timing but it is does slow down with the higher
compression factors.
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[--forwarded message--]
From: Alan Ariel <1052P%NAVPGS.BITNET@CUNYVM.CUNY.EDU>
Re: PKZ090.EXE
Here's a copy of a message I uploaded to some of the local BBS on a
comparison:
I just thought I might enlighten a few people with some stats on
PKZIP. There's a large software package on my hard disk. I don't
use it all of the time, so I keep it ARC'ed up and UNARC it when
I need it. Here is a comparison of PKPAK and PKZIP using the
extra compression feature:
Uncompressed: 1,088,419 bytes
PKPAK: 765,177 bytes (29.7% Compression)
PKZIP: 636,923 bytes (41.5% Compression)
(used with -ea4 and -eb4 parameters)
It ran a lot slower, but space is more critical than time. And,
if PKZIP is run without extra compression, it's execution time
is comparable to PKPAK.
This one was worth waiting for !
-Alan
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Thanks, Les and Alan.
PKZ090.EXE is now in the PD1:<MSDOS.ZIP> directory.
--Keith