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7-Zip is a free and open-source file archiver, a utility used to place groups of files within compressed containers known as "archives". It is developed by Igor Pavlov and was first released in 1999. [2] 7-Zip has its own archive format called 7z introduced in 2001, [12] but can read and write several others.
7zip with Zstandard on GitHub " Smaller and faster data compression with Zstandard ", Yann Collet and Chip Turner, 31 August 2016, Facebook Announcement The Guardian is using ZStandard instead of zlib
7z is a compressed archive file format that supports several different data compression, encryption and pre-processing algorithms. The 7z format initially appeared as implemented by the 7-Zip archiver. The 7-Zip program is publicly available under the terms of the GNU Lesser General Public License.
The author, Wei Dai states "This code is less clever, but hopefully more understandable and maintainable [than zlib]". 7-Zip: written by Igor Pavlov in C++, this version is freely licensed and achieves higher compression than zlib at the expense of CPU usage. Has an option to use the DEFLATE64 storage format.
The 7-Zip implementation uses several variants of hash chains, binary trees and Patricia trees as the basis for its dictionary search algorithm. In addition to LZMA, the SDK and 7-Zip also implements multiple preprocessing filters intended to improve compression, ranging from simple delta encoding (for images) and BCJ for executable code. It ...
zlib (/ ˈ z iː l ɪ b / or "zeta-lib", / ˈ z iː t ə ˌ l ɪ b /) [2] [3] is a software library used for data compression as well as a data format. [4] zlib was written by Jean-loup Gailly and Mark Adler and is an abstraction of the DEFLATE compression algorithm used in their gzip file compression program. zlib is also a crucial component of many software platforms, including Linux, macOS ...
Zopfli is a data compression library that performs Deflate, gzip and zlib data encoding. [2] It achieves higher compression ratios than mainstream Deflate and zlib implementations at the cost of being slower. [3] Google first released Zopfli in February 2013 under the terms of Apache License 2.0. [4]
7z XZ RAR LHA/LZH ACE SIT SITX ARJ KGB DAR ARC CAB ALZ ISO/CD Image ZPAQ Special 7-Zip: Yes Yes Yes [b] Yes [b] Yes Yes [b] No No No No No No No No No No No No No ALZip [c] Yes Yes Yes Yes No Unknown No No No No No No No No No Yes Yes Unknown No Archive Manager: Yes Yes Yes Yes Yes Yes No [d] Yes Unknown Unknown Unknown Yes Unknown ...
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