Comparison of comparison of current popular software
1 software introduction
2 software compression algorithm
3 compression environment
4 compression comparison
5 evaluation
1 software introduction
Bzip 2.0
It is widely used in the Linux environment, excellent compression performance, compression, and fast decompression speed.
WiRAR2.0
A popular compression tool, support mouse drag and drop and housing extensions, perfectly support ZIP files, built-in programs can unope with multiple types of compression such as CAB, ARJ, LZH, TAR, GZ, ACE, UUE, BZ2, JAR, ISO Document; have an estimated compression function, you can get the approximate compression ratio in three compression modes of ZIP and RAR before compressed files; have history records and favorite features; compression ratio is quite high, and resource occupation is relatively Less, fixed compression, multimedia compression, and multi-volume self-release compression is not available; it is very simple and convenient to use, and there are not many configuration options. You can do the work you want to do only in the resource manager; for Zip And RAR's self-release file (can be available in DOS, and Windows format), click on attribute to easily know the compression properties of this file, if you have any comments, you can view its contents in the properties. The new version has strengthened NT / 2000 functionality in information security and data streams, and saves different compression configurations for different needs. When WinRAR decompresses the ZIP file, it is the code provided by Infozip. Many other compressed formats in WinRar have a decoding plug-in.
Winzip
Winzip 9.0 main improvements are concentrated in several core compression, compatibility, and new super data encryption. Through Winzip 9.0 you can get a larger compression ratio, better compression, and safer to protect your sensitive sensitive data. Winzip 9.0 contains advanced "Vacuum" compression algorithm, which further improves the compression ratio and the size of the packaged ZIP file, saving you time and disk space for you. However, the previous version of Winzip will not be able to decompress the ZIP file packaged with the new compression algorithm. The zip file uses a variant of the LZ77 algorithm to compress the data.
UHARC GUI V1.1.5E
Excellent compression software, known as the largest compression ratio of the world.
2 software compression algorithm
Winzip 9.0 includes advanced "ENHANCED DEFLATE) compression algorithm.
Sound compressed files are a specific compressed file stored in Rar, which treats all the files in the compressed file as a continuous data stream. Sound compressed files support only compressed files in RAR format, the ZIP compressed file is always non-solid.
3 compression environment
Windows 2000 SP4
Linux9.0 for bzip2.0
4 compression comparison
BZIP2.0
Original Data à 44 * 8 / 154.6 = 2.278
Pure Data à 31.3 * 8 / 118.2 = 2.118
CAPTION TEXT à 2.2 * 8 / 5.9 = 2.983
(2.2 31.3) * 8 / 154.6 = 1.734
UHARC GUI V1.1.5E
Original Data à 40.8 * 8 / 154.6 = 2.111
Pure Data à 27.9 * 8 / 118.2 = 1.888
Caption text à 2.28 * 8 / 5.87 = 3.107
WinRAR3.20
Original Data à 49.6 * 8 / 154.6 = 2.566
Pure Data à 33.7 * 8/118 = 2.28
Caption text à 2.39 * 8 / 5.87 = 3.257
Winzip9.0beta test
Original Data à 53.5 * 8 / 154.6 = 2.768
Pure Data à36.4 * 8 / 118.2 = 2.46caption text à 2.43 * 8 / 5.87 = 3.311
5 evaluation
UHARC GUI's compression performance is indeed excellent, the only unfortunate is that the format and mainstream format of the compressed file are inconsistent. The compressed performance of BZIP in the Linux environment is much better than the compressed performance of software that is often used in the Windows environment. In particular, the compression of the text.
