|ReleasedLast Release||Apr 2015|
LZ4 is lossless compression algorithm, providing compression speed at 400 MB/s per core, scalable with multi-cores CPU. It also features an extremely fast decoder, with speed in multiple GB/s per core, typically reaching RAM speed limits on multi-core systems. A high compression derivative, called LZ4_HC, is also provided. It trades CPU time for compression ratio.
- The "master" branch is considered stable, at all times.
- The "dev" branch is the one where all contributions must be merged before being promoted to master.
- If you plan to propose a patch, please commit into the "dev" branch. Direct commit to "master" are not permitted.
- Feature branches can also exist, for dedicated testing of larger modifications before merge into "dev" branch.
The benchmark uses the Open-Source Benchmark program by m^2 (v0.14.2) compiled with GCC v4.6.1 on Linux Ubuntu 64-bits v11.10, The reference system uses a Core i5-3340M @2.7GHz. Benchmark evaluates the compression of reference Silesia Corpus in single-thread mode.
|LZ4 (r101)||2.084||422 MB/s||1820 MB/s|
|LZO 2.06||2.106||414 MB/s||600 MB/s|
|QuickLZ 1.5.1b6||2.237||373 MB/s||420 MB/s|
|Snappy 1.1.0||2.091||323 MB/s||1070 MB/s|
|LZF||2.077||270 MB/s||570 MB/s|
|zlib 1.2.8 -1||2.730||65 MB/s||280 MB/s|
|LZ4 HC (r101)||2.720||25 MB/s||2080 MB/s|
|zlib 1.2.8 -6||3.099||21 MB/s||300 MB/s|
The LZ4 block compression format is detailed within lz4_block_format.txt.
For streaming unknown amount of data and compress files of any size, a frame format has been published, and can be consulted within the file LZ4_Frame_Format.html .