ZX Pilot #29 30 сентября 1998

Софт

about different - Pick your best compressor data.

(C) POL / ALFA RESEARCH

Choose your best compressor.

At home even the walls have to bear
a useful information. We
in the vanguard of progress,
used to save each of its
molecule.
(AN quarter,
 "Diary of a Madman")


   Test results for me ievestnyh compressors:



   1. Introduction.


   Table 1. Contestants:

 1. COMPRES * (A. S. KOLN, 1992);
 2. COMPRES2 (?);
 3. COMPR (Baliasov?);
 4. COMPRESS (Baliasov, Moscow, 1989);
 5. COMPRES. v2.0 (Baliasov?);
 6. COCO v1.01 (Mike Studio, St.-Peterburg, 1991);
 7. SUPERPACK v2.0 (V. Vasilevsky, V. Kataev, 02.93, Kirov);
 8. S $ (Super Screen-a) v1.03 (A. Ermakov, 1993);
 9. COMP 303 (Mike Studio, 1992);
10. COMP $ (ASC Screen Crasher, A. Sendetsky, 1991);
11. SCP v3.1 (MIKROPOL, Poland, 1989; SHRSOFT, Rybinsk, 1992);
12. INDEX (Pencraft, 1991);
13. ZYX-comp v4.0 (Sobolev);
14. ZXZIP Fast v1.02s (MI'DI, 1994; M. Kondratyev);
15. B. Packer v3.0 (BOND, 1993);
16. S. COMPR Plus (Moscow, 1989);
17. MS_PACK v1.96 (Microspace, 01.96, Kiev), 128 Kb;
18. LZHG v1.4;
19. LZHG v2.4;
20. Trush v3.862 (A. Thrush, 1992);
21. CC v3.11 (KSA, 01.96);
22. RAM-Pack (MRPACK, DJS SoftWare, 1990; MR SoftWare, 1991);
23. LZ-Comp v1.0 (V. Gamazov, 1994);
24. LZSSPACK v4.5 (LZSSNEW, ASC, Dnepropetrovsk, 1991);
25. LZSSDEPC v1.0 (V. Gamazov, unpacker for the LZ-COMP v1.0.);
26. DECOMPR * (ASKOLN, 1992, decompressor for COMPRES *);
27. DUPAPACK (Dupanov A., 12.92);
28. MPACK v1.2 (AY-Group, 10.95);
29. VD (Visual Decompressor v1.2, Thimoty, 1995);
30. SO (Screen Optimizer v4.2, Ponomarev, Chelyabinsk, 12.94);
31. Animation v3.0 Compressor, Velichutin, Chelyabinsk);
32. DSQ v4.12. (APUS, Dream Makers, 1995);
33. ASO (Amazing Screen Optimizer v0.1, VVG);
34. ZXUNZIP! (MI'DI, 1994, unpacker for ZXZIP v1.02s);
35. RLE-Compressor v1.21 (Dr.Dash, Tula, 1997);
36. PCD (Powerfull Code Decreaser v6.2, KSA, 1996; VEKA, 09.97);
37. PCD (Powerfull Code Decreaser v6.1, KSA, 1996);
38. QSV (Quick Screen Viewer v1.0, ABBA, 1997);
39. HRUM v3.5i (Dmitry Pyankov, Gorno-Altaisk, 09.97);
40. Compressor Code v4.0 (V. Sobolev, ZYX, 1993);
41. RAR v2.0 (IBM PC).


   Test conditions:


   As the test files used block codes
containing graphics (sprites) information and object code
some kind of program length 26680 bytes (105 sectors) and a 
standard Spectrum Screen 6912 bytes - screensaver to electronic 
journals from Naberezhnye Chelny - SPECTRUM LAND (do not 
confuse it with the same). 


   Notes:

   Decompressor, of course, did not participate in the testing.

   If there are several options for compression in table 2
was brought best results.

   The length of the decompressor summed with the compressed 
block. 

   The efficiency of a file after extraction has not been 
verified. 



   2. Results.


   Interpretation of Table 2 (see below):


   In all cases:
<None> - no data available or not tested;
+ Positive result;
- A negative result.


   Compression code:
+ Compression can not only display but also any file;
- Not possible.


   Species:
The number of selectable modes of compression, or the method 
used. 


   Fix.:

   The presence of a fixed start decompressor:
+ A;
- Not available.


   Length1:
Length after compression file sl5. C.


   Dlina2:
Length after compression file mc. C.


   Pak.:
+ Repacking the file is possible a second time and gives an 
even greater 

  compression;
- Has not been verified.


   Dec.:
The length of the decompressor, in bytes.


   Adv.:
Extension for new file, if it differs from. C.


   Table 2. The results of testing various archivers.

Number of compressor Species Fix. Length1 Dlina2 Pak. Dec. Adv.
Table 1 Sia code


  1 - 4 - 3538 -

  2 - 3885 - -

  3 - + 4629 -

  4 - 4628 - 31

  5 + - 4 628 27 090 1931

  6 + 4,790 18,813 have

  7 - LZH 3312 - + $

  8 - spetseff. 7112 + - +

  9 + 4684 18 761 -
 1910 - LZSS 3186 - +
 11 - 4 - 3538 -
 12 - 4601 -
 13 + - 4186 12553 -
 14 + 3 3612 10524 + - Z
 15 + 18 566 4611. Pak
 16 (tape version, God, what an antiquity.)
 17 + 2, Huffman - 3504 10 780 192
 18 + LZH - 3926 13049
 19 + LZH - 3932 12815
 20 + 6489 10937
 21 + - 3828 12499
 22 + + 4936 18871
 23 + 3551 12493 41 A
 24 + - 3843 12776
 25 -
 26 -
 27 (not tested)
 28 - 6144 -
 29 - 9, spetseff. 3604 - +
 30 - May 2881 -
 31 - 4597 -
 32 + 3367 11162 176
 33 - 4858 -
 34 -
 35 (not tested)
 36 + 2 - 3 499 10 737 196 is
 37 + 2 - 3 499 11 045 204 is
 38 - 2992 - $
 39 + 2 - 3 433 10 866 119
 40 + 2 - 4 052 12 228
 41 + 6 10412 17234 7259

         without decompression .... 3153 9975


   Notes:

   14 and 23 - files can be placed in the archives of the same 
name. 

   8, 29 and 34 - an opportunity to establish the effect when 
decompressing. 


   3. Conclusions.


   Use programs ZXZIP Fast (), MS_PACK and TRUSH. They
showed the best results. To compress files on-screen
better take advantage of programs SUPERPACK, DSQ and COMP $. 
Other Draw your own conclusions from the data table. More

looking for information in HELP.


   P.S. Speccy Alive 4ever!