Compression algorithms have emerged in response to the painful problem of growing amounts of user requests for files. During the very limited amount of multimedia and
slow connections to the Internet were able to save a lot of time and money. That is why in the past earned a popular and priznanie.Vremya did not
at a standstill. Users themselves can use the enormous amount of hard disks, make backups on cheap DVD drives and vysokoobemnye
Technology Bluray and HD-DVD become available to the masses. In
Internet connectivity is supported by the progress that today we pay per hour and therefore can download files and a whole night without fear of high bills for the phone.
Compression of our time

Today, compression algorithms are slightly different application. Size is not important but still, for example, the Internet is still Most files for download in
RAR format, or ZIP. This is mainly because people have learned to use these formats instead of file archives, that is as a tool for integrating large numbers
small files in a single file.

True to these mudflows, there is a format Tarball (expansion. Tar), which did not become popular. Virtually his knowledge of the user Linuxu. In Windows it is rare. It is therefore an integral part
traditional format remains the option of archival preservation, without compression, which is popular, than for this tool Tarball.

ZIP and RAR - classics
ZIP and RAR are classic and most popular format for compressing
files. It is thanks to their popularity and are an integral part of programs
usually intended to squeeze in an alternative format. ZIP to everything and yet
embedded in the operating sistemuWindows XP. RAR vice versa favorite thanks to its superlatives
compression.

Official program to work with these formats, WinZip and WinRAR, both
classic commercial programs. Therefore, for both, using all their
may have to pay. WinZip functional limitations and its
popularity has long been declining. This is because of the possibility of compressing only one
format. But still quite quickly, even with the standard settings. WinRAR same
allowed, except for its format, compress and format ZIP.

Both programs know how to break a compressed file, password-protect it, and to create
self-files that can be unpacked and the system without
set of programs. When comparing these two programs winner
become WinRAR. Thanks largely to support a competitive format.
ACE - a good program for middle algorithm

The format of ACE is not interesting algorithm. Because of the broad test
vyplyvaet that he has just hudshiesvoystva than RAR. The fact that it can be
to emphasize is that the utility program WinACE, with a wide
number of alternative formats and compression.
Program functionality is an excellent replacement
WinRAR for users who often placeholders lesser-known formats.
7-Zip - opensource with a high degree of compression

Advocated the replacement of licensed algorithms is quite practical 7-Zip.
Its compression properties are far from ZIP and RAR. The only problem with
Such is the speed compression algorithm, which is approximately half
WinRARa speed and approximately 20% speed WinZIPa. And it all even if
using the full power of computer processors using binucleated
Two of the fibers. With this format almost exclusively running PowerArchiver.
His minus is that does not know how to compress in RAR and other formats.
RK and UHA - unknown kings high compression
Less than a practical and very effective - this is such a two unknown
algorithm. Both have their own specialized compression program and there
little support from the universal programs. Both are likely solution for
extreme situations where there is a need to enter into a limit
and at the same time not divide compress files.

ZipGenius - unmversalny packer
If you're looking for a program to deal with most of the formats and will
the ability to compress them, pay attention to the program
ZipGenius. In addition to benefits in the form of support formats is the most valuable - the
is distributed as freeware. Detriment is the lack of RAR compression format
and ACE. While ZipGenius can read both.
Which program is best?
The answer to this question depends on the user's query. For those looking for one
format for all situations nayluchshim decision will be
Zip, thanks to the support of operating systems. Since etiv but can work
most programs, and therefore possibly unsatisfying WinZip boldly replaced
WinRARom example, that the same deal and quality format RAR. I
Both of these options no problem with the transfer, because both are clearly
known.

A user who is seeking support for a wider range of formats,
Rather, take advantage of such programs as WinACE,
PowerArchiver or actually quite universal and free program ZipGenius.
Fans will be happy opensource very practical format 7-Zip. To test
This format would be sufficient support from the above mentioned universal
programs.
Notes to the test
To test indicative of compression algorithms for individual properties were
used
350MB file format of Adobe Photoshop (. Psd).
For such a large file is erased the difference in time compression, which is when
continuing the process a few seconds, the small files that may have an impact
slightly different testing conditions. PSD to the same uses minimal
lossless compression and on such files use compression algorithms
seen the most.