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Yann Collet 3f80a22819 Merge pull request #26 from Cyan4973/frame 
Frame
2014-09-14 00:30:01 +02:00
cmake_unofficial minor cmake refresh 2014-08-21 01:43:33 +01:00
examples Added : examples from Takayuki Matsuoka 2014-08-26 14:27:22 +01:00
images Added : LZ4 Framing Format, new version (v1.4.1) 2014-08-18 16:00:00 +01:00
programs Merge pull request #26 from Cyan4973/frame 2014-09-14 00:30:01 +02:00
.gitattributes Added : LZ4 Framing Format, new version (v1.4.1) 2014-08-18 16:00:00 +01:00
.travis.yml Simplified travis test flow 2014-08-26 14:39:09 +01:00
liblz4.pc.in Added : pkg-config (issue 135) 2014-07-20 17:18:48 +02:00
LICENSE Fixed issue 127 & 128 2014-04-15 15:03:17 +02:00
lz4_format_description.txt Makefile : added capability to install libraries 2014-01-07 18:47:50 +00:00
lz4.c Frame decompression speed optimization 2014-09-13 19:49:01 +01:00
lz4.h Fix : streaming mode bug (re-using context & buffers) 2014-09-10 13:00:39 +01:00
lz4frame.c Restored variable output size fuzzer test 2014-09-13 21:21:41 +01:00
lz4frame.h fullbench : added benchmark for LZ4F_decompress() 2014-09-13 15:24:16 +01:00
lz4hc.c updated lz4hc 64-bits detection 2014-08-26 23:47:32 +01:00
lz4hc.h Revert "Introduced "Continuous Block Mode" (CBM) naming" 2014-08-09 23:14:26 +02:00
LZ4_Framing_Format.html modified permission 2014-08-27 00:03:12 +01:00
Makefile Added : preliminary frame decompression function 2014-09-01 22:44:02 +01:00
NEWS Updated : NEWS to r122 2014-08-28 13:20:25 +01:00
README.md clarified "dev" branch policy 2014-08-08 12:48:45 +01:00
xxhash.h Added : xxhash.h at root, for compilation 2014-09-04 22:57:32 +01:00

README.md

LZ4 - Extremely fast compression

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.

Branch Status
master Build Status
dev Build Status

This is an official mirror of LZ4 project, hosted on Google Code. The intention is to offer github's capabilities to lz4 users, such as cloning, branch, pull requests or source download.

The "master" branch will reflect, the status of lz4 at its official homepage. The "dev" branch is the one where all contributions will be merged. If you plan to propose a patch, please commit into the "dev" branch. Direct commit to "master" are not permitted. Feature branches will also exist, typically to introduce new requirements, and be temporarily available for testing before merge into "dev" branch.

Benchmarks

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.

CompressorRatioCompressionDecompression
LZ4 (r101)2.084422 MB/s1820 MB/s
LZO 2.062.106414 MB/s600 MB/s
QuickLZ 1.5.1b62.237373 MB/s420 MB/s
Snappy 1.1.02.091323 MB/s1070 MB/s
LZF2.077270 MB/s570 MB/s
zlib 1.2.8 -12.73065 MB/s280 MB/s
LZ4 HC (r101)2.72025 MB/s2080 MB/s
zlib 1.2.8 -63.09921 MB/s300 MB/s