Public Spirit #01 17 мая 1997

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Coder - an overview of current data packer: MS-Pack, Mega LZ, ZX-ZIP, ASC LZ PACK.

           Packers


                       Author:

                      (C) SEM

 Today we talk on the topic
packers. Among beginners
Programmers are disputes about
a packer better, more convenient and
etc., etc., so I decided
to test for several
parameters:
 Packing files (text,
graphics, codes) and the interface.
The test was conducted for four
packer:
1) MS-PACK (hereafter simply MS).
2) MEGA LZ PACKv2.6 (on C-26)
3) ZX-ZIP (hereinafter ZIP).
4) ASC LZ PACK (just LZ).
 On the interface more
easy to use MS, it has a very
a decent window system,
easy selection of files from a directory, the mapping process,
but also has the largest
disadvantage:
It is very slow pack.
 ZIP fairly well in
management, even a note
group of files. LZ has some
pitiful semblance of an interface.
 C-26 the same as the version of LZ
newer algorithm and steeper, and
interface that the same.
 Next, bring the table
obtained after packaging
Fail a few different
packers.

         Ok TABLE:

Len MS-PACK C-26 Zip LZ

+00 00803 01066 01010 00705 0103
+05 01386 02890 01463 01051 0182
+10 02794 06142 02685 01903 0453
+12 09022 22778 08412 08011 1003
+16 21195 37522 19890 18521 2532
+11 10015 17686 09280 08400 1242
++++++++ +++++ +++++ +++++ + + + +
+05 01887 04096 01928 01700 0203
+07 01881 04096 01941 01681 0234
+12 01862 04096 01930 01653 0222
+17 01887 04096 01962 01689 0233
----- -------- ----- ----- --- 27072 11915 +05 11203 10989 1301
+07 10683 27072 11397 10113 1234
+11 10780 27072 11493 10301 1253
===== ======== ===== ===== ====
+10 07590 10752 07551 07489 0832
+13 09358 11776 09267 09134 1001
+20 13299 16384 13148 12947 1410


     Notes:
 Len-length file to the package. In
Box MS-PACK + is after
increase in volume when the file
regime change from SLOW to FAST.
After the horizontal line in
table are text
files after the two-thirds
Conventional spekovskogo screen
(I took the files from source to
MOVER 2 and for a useful and
not bad for a magazine). After
strips plus sign are
IBMovskie scan images
and then strips out the "=" -
block codes. In the graph given LZ
File length divided by 10
(For short).
 Kruche all files
figured ZIP, he distinguished himself in
vsek 'weight categories', but
 due to a lack of
use the resulting files
very difficult. Lack of
is as follows: for
It is written ZX-UNZIP, and
The resulting blocks are therefore
themselves are not unpacked, and
length unpacker horrifying
therefore, levels of packaging and
graphics in games it is not suitable
very, algorithms and Packaging
unpack just fine, but
it does not interfere ZIP thoughtful
during the above
processes. So I will not dwell on this
packer and move on to
others.
 MS-PACK with texts figured
pretty good, if not
 taking into account the time zapakovki, but here there are 
problems with the graphics, codes better than the rest but not 
much. C unpacking him better, but

with C-26 it does not compare. C-26
packs a pretty cool (if not
taking into account the texts), with
graphics figured out better
the other, and with the codes well. LZ-excellent speed
packaging, and the result: huge
The size of the blocks.
Now we have to conclude from
TOTAL VYSHESKAZANOGO:
 1) If you need to simply create
ARCHIVAL Fail TO BETTER ZX-ZIP
YOU NOTHING TO FIND.

 2) If you need packed
GAME is recommended to use
MEGA LZ PACK v2.6 (IF
RESULTS AND WORSE THAN IN
USING MS-PACK DO NOT
More than a couple of TENS
BYTE, and this is no special role
PLAYS, BUT WIN OVER TIME
Dramatically).

 3) But if you really
WANT popolzovavshis FRIENDLY
INTERFACE, you can download
MS-PACK AND SEE boldly go
Movie or something else
DO.
 I hope this article helps
you save more than one hour!

(C) SEM from CODERS 'ACADEMY