From the results shown it turns out, the most common compression techniques and has become the current standard, ie zip, has a less efficiency compared with other techniques, although in speed aspect is still faster. More detail benchmark can be found at the site maximumcompression.
One of the best compression technique in efficiency and speed is the *.7z with its Open source software 7-zip. The 7-zip compression results often smaller than the WinRAR compression. When compared with Winzip, 7z is clearly better and sometimes result in half the size smaller than zip. 7-zip compression also supports other formats like zip, tar, bzip2 and gzip, rar, cab, arj, z, cpio, rpm (Linux package), deb, LZH, split and chm (html help). In addition, an Open Source license ofcourse also has its own advantages.
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