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The Ultimate Packer for eXecutables (UPX) is an executable file compressor. UPX typically reduces the file size of programs and shared libraries by around 50%--70%, thus reducing disk space, network load times, download times, and other distribution and storage costs.
Blosc is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() system call. Blosc is meant not only to reduce the size of large datasets on-disk or in-memory, but also to accelerate memory-bound computations.
lrzip is a compression utility that uses long-range redundancy reduction to improve the subsequent compression ratio of larger files. It can then further compress the result with the ZPAQ or LZMA algorithms for maximum compression, or LZO for maximum speed. This choice between size or speed allows for either better compression than even LZMA can provide, or a higher speed than gzip while compressing as well as bzip2.
ISA-L is a collection of optimized low-level functions targeting storage applications. ISA-L includes:
Erasure codes: fast block Reed-Solomon type erasure codes for any encode/decode matrix;
CRC: fast implementations of cyclic redundancy check. Six different polynomials supported: iscsi32, ieee32, t10dif, ecma64, iso64, jones64;
Raid: calculate and operate on XOR and P+Q parity found in common RAID implementations;
Compression: fast deflate-compatible data compression;
De-compression: fast inflate-compatible data compression;
igzip: command line application like gzip, accelerated with ISA-L.
This package provides a parallel implementation of gzip that exploits multiple processors and multiple cores when compressing data.
ZZipLib is a library based on zlib for accessing zip files.
Libdeflate is a library for fast, whole-buffer DEFLATE-based compression and decompression. The supported formats are:
DEFLATE (raw)
zlib (a.k.a. DEFLATE with a zlib wrapper)
gzip (a.k.a. DEFLATE with a gzip wrapper)
This package provides a simple zip library based on miniz.
7-zip is a command-line file compressor that supports a number of archive formats and features self-extracting archives.
Lzip is a lossless data compressor with a user interface similar to the one of gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses more than bzip2, which makes it well-suited for software distribution and data archiving. Lzip is a clean implementation of the LZMA algorithm.
xdelta encodes only the differences between two binary files using the VCDIFF algorithm and patch file format described in RFC 3284. It can also be used to apply such patches. xdelta is similar to diff and patch, but is not limited to plain text and does not generate human-readable output.
LZ4 is a lossless compression algorithm, providing compression speed at 400 MB/s per core (0.16 Bytes/cycle). It also features an extremely fast decoder, with speed in multiple GB/s per core (0.71 Bytes/cycle). A high compression derivative, called LZ4_HC, is also provided. It trades CPU time for compression ratio.
SfArk extractor converts SoundFonts in the compressed legacy sfArk file format to the uncompressed sf2 format.
zlib is designed to be a free, general-purpose, legally unencumbered -- that is, not covered by any patents -- lossless data-compression library for use on virtually any computer hardware and operating system. The zlib data format is itself portable across platforms. Unlike the LZW compression method used in Unix compress(1) and in the GIF image format, the compression method currently used in zlib essentially never expands the data. (LZW can double or triple the file size in extreme cases.) zlib's memory footprint is also independent of the input data and can be reduced, if necessary, at some cost in compression.
gzstream is a small library for providing zlib functionality in a C++ iostream.
QuaZIP is a simple C++ wrapper over Gilles Vollant's ZIP/UNZIP package that can be used to access ZIP archives. It uses Trolltech's Qt toolkit.
QuaZIP allows you to access files inside ZIP archives using QIODevice API, and that means that you can also use QTextStream, QDataStream or whatever you would like to use on your zipped files.
QuaZIP provides complete abstraction of the ZIP/UNZIP API, for both reading from and writing to ZIP archives.
A data compression/decompression library for embedded/real-time systems.
Among its features are:
Low memory usage (as low as 50 bytes.) It is useful for some cases with less than 50 bytes, and useful for many general cases with less than 300 bytes.
Incremental, bounded CPU use. It can be used to chew on input data in arbitrarily tiny bites. This is a useful property in hard real-time environments.
Can use either static or dynamic memory allocation.
Zstandard (zstd) is a lossless compression algorithm that combines very fast operation with a compression ratio comparable to that of zlib. In most scenarios, both compression and decompression can be performed in ‘real time’. The compressor can be configured to provide the most suitable trade-off between compression ratio and speed, without affecting decompression speed.
Zip is a compression and file packaging/archive utility. Zip is useful for packaging a set of files for distribution, for archiving files, and for saving disk space by temporarily compressing unused files or directories. Zip puts one or more compressed files into a single ZIP archive, along with information about the files (name, path, date, time of last modification, protection, and check information to verify file integrity). An entire directory structure can be packed into a ZIP archive with a single command.
Zip has one compression method (deflation) and can also store files without compression. Zip automatically chooses the better of the two for each file. Compression ratios of 2:1 to 3:1 are common for text files.
Snappy is a compression/decompression library. It does not aim for maximum compression, or compatibility with any other compression library; instead, it aims for very high speeds and reasonable compression. For instance, compared to the fastest mode of zlib, Snappy is an order of magnitude faster for most inputs, but the resulting compressed files are anywhere from 20% to 100% bigger.
LZFSE is a Lempel-Ziv style data compression algorithm using Finite State Entropy coding. It targets similar compression rates at higher compression and decompression speed compared to Deflate using Zlib.
GNU sharutils is a package for creating and manipulating shell archives that can be readily emailed. A shell archive is a file that can be processed by a Bourne-type shell to unpack the original collection of files. This package is mostly for compatibility and historical interest.
minizip-ng is a zip manipulation library written in C, forked from the zip manipulation library found in the zlib distribution.
minizip-ng is a zip manipulation library written in C, forked from the zip manipulation library found in the zlib distribution.