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ComponentAce presents public tests of well known multi-file compression libraries.
Diagram 1 presents comparison of maximum
compression ratio and according speed for all tested products.
The values are calculated as percentage from leader's value.
Table 1 displays the list of all tested products
Table 2 shows the results of the famous
.
Diagram 1. Relative maximum compression ratio and according speed.
Table 1. Tested products.
| Product |
Description |
|
FlexCompress, v.1.00 (PPM algorithm)
|
Flexible compression algorithms (PPM, BZIP and Deflate) and
strong encryption (Rijndael, Twofish, Blowfish, Square, 3DES, DES)
|
|
FlexCompress, v.1.00 (BZIP algorithm)
|
Flexible compression algorithms (PPM, BZIP and Deflate) and
strong encryption (Rijndael, Twofish, Blowfish, Square, 3DES, DES)
|
|
ZipForge, v.1.00
|
Fast ZIP compression library with transaction system.
Free for personal use.
|
|
VCLZIP, v.2.23
|
Compression library.
|
|
ZipTV, v.4.8.5
|
Compression library.
|
|
Abbrevia, v.3.01
|
Compression library.
|
Table 2. The results of the famous Calgary Corpus Test.
Compression
algorithm |
Unpacked size, Bytes |
Packed size, Bytes |
Compression time, sec. |
Compression ratio, % |
| FlexCompress 1.00 PPM Mode 3 |
3,251,493 |
819,244 |
5.9 |
74.8 % |
| FlexCompress 1.00 BZIP Mode 3 |
3,251,493 |
900,672 |
7.4 |
72.3 % |
| ZipForge 1.00 Mode 9 |
3,251,493 |
1,061,189 |
10.1 |
67.4 % |
| VCLZIP 2.23 Mode 9 |
3,251,493 |
1,060,575 |
12.1 |
67.4 % |
| ZipTV 4.8.5 DeflateX |
3,251,493 |
1,061,117 |
11.1 |
67.4 % |
| Abbrevia 3.01 Cab |
3,251,493 |
1,062,878 |
12.1 |
67.3 % |
All tests were running on the same machine, Intel Pentium II 300 MHz,
200 MB RAM, 45 GB HDD, OS Microsoft Windows Millennium.
Time measurement precision is 0.1 sec.
In any case, with any publishing of any investigations using the materials presented here,
you must refer to ComponentAce as the author and the article itself.
We give you a possibility to perform your own tests using our test program.
You can
download its source code for free.
© ComponentAce, 2003.
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