The 7z format groups files by extension (regardless of the directories in which they are located), and keeps its compression tables from one file to another. That is, once a file is compressed, ZIP forgets all its compression tables and starts "learning" again with the following file. The ZIP format is quite stupid: It compresses each file individually, out of context. These specialized compression methods give better results than the generic LZMA or deflate algorithms on these types of data. In addition to LZMA, 7z has specialized compression methods for certain types of files, for example the BCJ algorithm for compressing x86 (.exe) executables. Example: One takes the list of titles of articles Wikipedia francophone (single file of 41 Mo) : 7-Zip uses several methods, including LZMA which is more powerful than deflate. This method is fast and consumes little memory, but it is relatively old. (The zip64 format that exceeds this limit is not standard and does not work anywhere.) ZIP uses the deflate compression method (which is a combination of LZ77 and Huffman). The maximum size that a 7z file can support is 16,000,000,000 GB per compressed file. It may not tell you anything, but it allows you to encode the correct international characters, regardless of the systems used. Let me put forward some advantages of the 7z format on the ZIP format:ħz supports Unicode, ZIP format not. Not only does 7-Zip decompress the ZIP, RAR, and many other formats (arj, cab, lha, gz, bzip2, iso. I do not understand the stubbornness of some users to use (see cracker) WinZip (paying) or WinRAR (paying too) while free and more powerful alternatives like 7-Zip (exist. Since things have evolved well, and the 7z format is now much higher. 21 years is an eternity in computer science.
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