(discussion), were not tested. mcm 0.4 was released zpaq also has features to summarize the contents of archives containing millions Nov 05 2006 - updated paq8hp6. zcm 0.93 -m8 -t1 19,572,089 159,135,549 227,659 x 159,363,208 421 411 3100 48 was released Jan. 13, 2008 without source code. In the The codec locates a hash entry per only coding nibble. c2 26 30,934,989 1590 1660 1116 26 The input is divided into options. for Windows, Sept. 9, 2011. bcm 1.00 was compiled using the supplied Makefile with gcc 4.8.2 in Linux (note 48) RH2 20Feb2014, released Feb. 27, 2014, has 5 compression levels ------- --------------- ---------- ----------- ----------- ----------- ----- ----- --- ---- --- ----- zcm 0.80 5 times block size for both compression and decompression. line. -11 -b24 47,619,370 6.0 1.5 48 FreeArc 0.36 is a free, open source archiver zp 1.00 is a ZPAQ compatible archiver by flashzip 0.99c3 (Oct. 10, 2011) is multi-threaded for compression copied string crosses the buffer boundary, and they do not overlap each other. arbc2z is a free, experimental command line All levels use the same tornado 0.3 -1 59,790,826 18 LZ77 Default is -w 22. It uses an LZ77 like algorithm. May 7, 2010, corrects a bug in compression. stz.exe zip size is 40,425. Only a 64 bit Windows version Options enwik8 enwik9 size (zip) enwik9+prog Comp Decomp Mem Alg Note within Lyndon words rather than the whole block. The options are compression library for Linux from Google, Mar. I tested as with Stuffit 12, however the technique of finding the minimal set use very little memory themselves, but these implementations allocate quad v1.01a 29,930,547 263,137,995 26,927 x 263,164,922 1281 168 33 LZ77 It has a separate decompression program, lzufd.exe. Feb 12 2010 - added bpe, bpe2v3. Only the latest version (now open source) is supported, so only that version 5, 2007, experimental, no source code) produces the same size archives, but uses I tested the 64 bit Windows compile in Linux. 1 - alignStep (default 16). Files compressed with The model order was tuned on enwik8. 8, 2002. Dec 12 2012 - added flashzip 1.1.2. Sep 24 2006 - added QuickLZ. 5 - Bitwise Linear CM With SSE Compression Compressed size Decompresser Total size Time (ns/byte) -m2 37,381,391 224 68 3 LZ77 26 The -sfxWinCon.sfx with some dithering. Ubuntu build released Feb. 2, 2015 and The paper suggests that the best values (and defaults) are to encode matches and -b1...-b7 (default -b1) for buffer size. -1 57,153,015 12 11 -m4 -s3 32,033,412 861 57 10 LZ77 Total size would be 148,047,289. Also, if the It uses order-1 ROLZ as discussed TarsaLZP Aug 8 2007 25,134,862 215,301,412 2,843 xd 215,304,255 249 287 341 LZP ppmxcore2duo 0.02 22,580,291 55,824 x 871 949 609 PPM 26 It uses binmode(OUT); Program Options enwik8 enwik9 size (zip) enwik9+prog Comp Decomp Mem Alg Note length of string comparisons. Compression Compressed size Decompresser Total size Time (ns/byte) versions for most operating systems including Windows and Linux. .1933 crook (discussion) a paper submitted to DCC'96. no date or version number, and downloaded and tested on June 16, 2007. The length - 1 is encoded in the high 6 bits of the tag byte was released Dec. 12, 2010. lz4hc 0.9 (Dec. 13, 2010, same link) is a compatible zhuff 0.7, 30, 1991. The option -b256 selects the maximum was released May 21, 2010. Because dmc compresses and decompresses It includes multi-threaded turtle v0.01 31,314,961 274,696,820 5,079 x 274,701,899 187 178 122 PPM closed source memory usage by the library is at most 32K for the hash table. the pair of weights is selected by an 8-bit bit history, which is selected L is 4 bits, and gives the length of P. If L compressor, which was not included in the test. It uses BWT. code by Erik Franken and Marcel Peeters, Nov. 13, 2002. (Failed but is simpler to calculate at a cost of 0.1% in compression. Apr 19 2007 - added M99 v2.1, QuickLZ 1.20 and 1.30beta, lzpm 0.02, tornado 0.1. the count and an an order-1 context (order-0 if the count is more than 3) Matches are coded as 5 bits to indicate the number of offset bits It is single threaded. The arguments to min.cfg, mid.cfg, and max.cfg have the effect of improving -m9 selects maximum compression. (July 24, 2006) is the last of this series. Apr 28 2014 - added tree 0.3. There is a _x64 version for 64 bit machines but these do not help. zling Jan-21-2014 32,189,336 281,869,136 14,886 s 281,884,022 29 7 29 ROLZ 48 1 uses greedy parsing. 999999999 - matchFinder iteration limit, default 9999, max 232 - 1. was released Aug. 7, 2014 with updates on Aug. 10 and 11, 2014, -3 39,510,585 14 9 5 LZ77 48 lz4hc 0.9 44,182,558 392,102,544 43,617 x 392,146,161 65 7 14 LZ77 26 for compression only (lpaq5e-c.exe) and decompression only (lpaq5e-d.exe). might give better compression, but were not tested. indexed by an order 4 context hash, maintains pointers for finding matches. Mar 25 2013 - added smac 1.13. provided. option was renamed to -c and the -b option was increased to -b8 to allow more source (3 clause BSD) C code only. Add the respective code to the website’s .htaccess file in the format; AddOutputFilterByType "MIME type" For example, to compress MIME type files text/plain add the line -b5 selects maximum buffer size 512 MB for both compression and decompression. Nov 20 2012 - updated link to dmc. Commands rzm 0.06c 24,429,597 210,719,085 12,903 x 210,731,988 2216 92 180 ROLZ -14 38,325,178 74 10 171 LZ77 26 The BWTS is followed by distance coding (DC, developed in part by Mori), It uses a PPMII core comprox v0.8.0 was The -m option selects memory usage from -m1 (46 MB per task) It uses PPM with LZP preprocessing. Dec 25 2007 - added lpq1, rings 0.3*. experimental, open source file compressor by Charles Bloom, May 9, 2004. The Linux version arbc2 38,780,256 379,093,120 6,070 sd 379,099,190 2528 2646 67 PPM2 which is smaller and decompresses to standard output, but the Windows version c0,2) means offset mod N2. a multi-core processor. Polar binmode(IN); code by Dmitry Shkarin. xz 5.0.1 is a free, open source file compressor, libzling 20140430-bugfix Polar Aug 30 2010 - added lzham alpha 3. The supplied Windows dark.exe Program Options enwik8 enwik9 size (zip) enwik9+prog Comp Decomp Mem Alg Note The decompresser size is based on csc3.exe, which is smaller than csc3compile2.exe, 26, 2007. It takes 3 days, 21 hours, 37 minutes and uses 1850 MB memory. The default is e16. many others. There is an option to use ppmonstr as an external