2 New license : BSD + GPLv2
3 perf: substantially decreased memory usage in Multi-threading mode, thanks to reports by Tino Reichardt (@mcmilk)
4 perf: Multi-threading supports up to 256 threads. Cap at 256 when more are requested (#760)
5 cli : improved and fixed --list command, by @ib (#772)
6 cli : command -vV to list supported formats, by @ib (#771)
7 build : fixed binary variants, reported by @svenha (#788)
8 build : fix Visual compilation for non x86/x64 targets, reported by Greg Slazinski (@GregSlazinski) (#718)
9 API exp : breaking change : ZSTD_getframeHeader() provides more information
10 API exp : breaking change : pinned down values of error codes
11 doc : fixed huffman example, by Ulrich Kunitz (@ulikunitz)
12 new : contrib/adaptive-compression, I/O driven compression strength, by Paul Cruz (@paulcruz74)
13 new : contrib/long_distance_matching, statistics by Stella Lau (@stellamplau)
14 updated : contrib/linux-kernel, by Nick Terrell (@terrelln)
17 cli : new : `--list` command, by Paul Cruz
18 cli : changed : xz/lzma support enabled by default
19 cli : changed : `-t *` continue processing list after a decompression error
20 API : added : ZSTD_versionString()
21 API : promoted to stable status : ZSTD_getFrameContentSize(), by Sean Purcell
22 API exp : new advanced API : ZSTD_compress_generic(), ZSTD_CCtx_setParameter()
23 API exp : new : API for static or external allocation : ZSTD_initStatic?Ctx()
24 API exp : added : ZSTD_decompressBegin_usingDDict(), requested by Guy Riddle (#700)
25 API exp : clarified memory estimation / measurement functions.
26 API exp : changed : strongest strategy renamed ZSTD_btultra, fastest strategy ZSTD_fast set to 1
27 tools : decodecorpus can generate random dictionary-compressed samples, by Paul Cruz
28 new : contrib/seekable_format, demo and API, by Sean Purcell
29 changed : contrib/linux-kernel, updated version and license, by Nick Terrell
32 cli : changed : Multithreading enabled by default (use target zstd-nomt or HAVE_THREAD=0 to disable)
33 cli : new : command -T0 means "detect and use nb of cores", by Sean Purcell
34 cli : new : zstdmt symlink hardwired to `zstd -T0`
35 cli : new : command --threads=# (#671)
36 cli : changed : cover dictionary builder by default, for improved quality, by Nick Terrell
37 cli : new : commands --train-cover and --train-legacy, to select dictionary algorithm and parameters
38 cli : experimental targets `zstd4` and `xzstd4`, with support for lz4 format, by Sean Purcell
39 cli : fix : does not output compressed data on console
40 cli : fix : ignore symbolic links unless --force specified,
41 API : breaking change : ZSTD_createCDict_advanced(), only use compressionParameters as argument
42 API : added : prototypes ZSTD_*_usingCDict_advanced(), for direct control over frameParameters.
43 API : improved: ZSTDMT_compressCCtx() reduced memory usage
44 API : fix : ZSTDMT_compressCCtx() now provides srcSize in header (#634)
45 API : fix : src size stored in frame header is controlled at end of frame
46 API : fix : enforced consistent rules for pledgedSrcSize==0 (#641)
47 API : fix : error code "GENERIC" replaced by "dstSizeTooSmall" when appropriate
48 build: improved cmake script, by @Majlen
49 build: enabled Multi-threading support for *BSD, by Baptiste Daroussin
50 tools: updated Paramgrill. Command -O# provides best parameters for sample and speed target.
51 new : contrib/linux-kernel version, by Nick Terrell
54 cli : new : can compress in *.gz format, using --format=gzip command, by Przemyslaw Skibinski
55 cli : new : advanced benchmark command --priority=rt
56 cli : fix : write on sparse-enabled file systems in 32-bits mode, by @ds77
57 cli : fix : --rm remains silent when input is stdin
58 cli : experimental : xzstd, with support for xz/lzma decoding, by Przemyslaw Skibinski
59 speed : improved decompression speed in streaming mode for single shot scenarios (+5%)
60 memory: DDict (decompression dictionary) memory usage down from 150 KB to 20 KB
61 arch: 32-bits variant able to generate and decode very long matches (>32 MB), by Sean Purcell
62 API : new : ZSTD_findFrameCompressedSize(), ZSTD_getFrameContentSize(), ZSTD_findDecompressedSize()
63 API : changed : dropped support of legacy versions <= v0.3 (can be changed by modifying ZSTD_LEGACY_SUPPORT value)
64 build : new: meson build system in contrib/meson, by Dima Krasner
65 build : improved cmake script, by @Majlen
66 build : added -Wformat-security flag, as recommended by Padraig Brady
67 doc : new : educational decoder, by Sean Purcell
70 cli : zstd can decompress .gz files (can be disabled with `make zstd-nogz` or `make HAVE_ZLIB=0`)
71 cli : new : experimental target `make zstdmt`, with multi-threading support
72 cli : new : improved dictionary builder "cover" (experimental), by Nick Terrell, based on prior work by Giuseppe Ottaviano.
73 cli : new : advanced commands for detailed parameters, by Przemyslaw Skibinski
74 cli : fix zstdless on Mac OS-X, by Andrew Janke
75 cli : fix #232 "compress non-files"
76 dictBuilder : improved dictionary generation quality, thanks to Nick Terrell
77 API : new : lib/compress/ZSTDMT_compress.h multithreading API (experimental)
78 API : new : ZSTD_create?Dict_byReference(), requested by Bartosz Taudul
79 API : new : ZDICT_finalizeDictionary()
80 API : fix : ZSTD_initCStream_usingCDict() properly writes dictID into frame header, by Gregory Szorc (#511)
81 API : fix : all symbols properly exposed in libzstd, by Nick Terrell
82 build : support for Solaris target, by Przemyslaw Skibinski
83 doc : clarified specification, by Sean Purcell
86 API : streaming : decompression : changed : automatic implicit reset when chain-decoding new frames without init
87 API : experimental : added : dictID retrieval functions, and ZSTD_initCStream_srcSize()
88 API : zbuff : changed : prototypes now generate deprecation warnings
89 lib : improved : faster decompression speed at ultra compression settings and 32-bits mode
90 lib : changed : only public ZSTD_ symbols are now exposed
91 lib : changed : reduced usage of stack memory
92 lib : fixed : several corner case bugs, by Nick Terrell
93 cli : new : gzstd, experimental version able to decode .gz files, by Przemyslaw Skibinski
94 cli : new : preserve file attributes
95 cli : new : added zstdless and zstdgrep tools
96 cli : fixed : status displays total amount decoded, even for file consisting of multiple frames (like pzstd)
98 zlib_wrapper : added support for gz* functions, by Przemyslaw Skibinski
99 install : better compatibility with FreeBSD, by Dimitry Andric
100 source tree : changed : zbuff source files moved to lib/deprecated
103 New : command -M#, --memory=, --memlimit=, --memlimit-decompress= to limit allowed memory consumption
104 New : doc/zstd_manual.html, by Przemyslaw Skibinski
105 Improved : slightly better compression ratio at --ultra levels (>= 20)
106 Improved : better memory usage when using streaming compression API, thanks to @Rogier-5 report
107 Added : API : ZSTD_initCStream_usingCDict(), ZSTD_initDStream_usingDDict() (experimental section)
108 Added : example/multiple_streaming_compression.c
109 Changed : zstd_errors.h is now installed within /include (and replaces errors_public.h)
111 Fixed : zstd-small, zstd-compress and zstd-decompress compilation targets
114 New : contrib/pzstd, parallel version of zstd, by Nick Terrell
115 added : NetBSD install target (#338)
116 Improved : speed for batches of small files
117 Improved : speed of zlib wrapper, by Przemyslaw Skibinski
118 Changed : libzstd on Windows supports legacy formats, by Christophe Chevalier
119 Fixed : CLI -d output to stdout by default when input is stdin (#322)
120 Fixed : CLI correctly detects console on Mac OS-X
121 Fixed : CLI supports recursive mode `-r` on Mac OS-X
122 Fixed : Legacy decoders use unified error codes, reported by benrg (#341), fixed by Przemyslaw Skibinski
123 Fixed : compatibility with OpenBSD, reported by Juan Francisco Cantero Hurtado (#319)
124 Fixed : compatibility with Hurd, by Przemyslaw Skibinski (#365)
125 Fixed : zstd-pgo, reported by octoploid (#329)
128 Change Licensing, all project is now BSD, Copyright Facebook
129 Small decompression speed improvement
130 API : Streaming API supports legacy format
131 API : ZDICT_getDictID(), ZSTD_sizeof_{CCtx, DCtx, CStream, DStream}(), ZSTD_setDStreamParamter()
132 CLI supports legacy formats v0.4+
133 Fixed : compression fails on certain huge files, reported by Jesse McGrew
134 Enhanced documentation, by Przemyslaw Skibinski
138 Changed : --ultra now enables levels beyond 19
139 Changed : -i# now selects benchmark time in second
140 Fixed : ZSTD_compress* can now compress > 4 GB in a single pass, reported by Nick Terrell
141 Fixed : speed regression on specific patterns (#272)
142 Fixed : support for Z_SYNC_FLUSH, by Dmitry Krot (#291)
143 Fixed : ICC compilation, by Przemyslaw Skibinski
146 Improved : better speed on clang and gcc -O2, thanks to Eric Biggers
147 New : Build on FreeBSD and DragonFly, thanks to JrMarino
148 Changed : modified API : ZSTD_compressEnd()
149 Fixed : legacy mode with ZSTD_HEAPMODE=0, by Christopher Bergqvist
150 Fixed : premature end of frame when zero-sized raw block, reported by Eric Biggers
151 Fixed : large dictionaries (> 384 KB), reported by Ilona Papava
152 Fixed : checksum correctly checked in single-pass mode
153 Fixed : combined --test amd --rm, reported by Andreas M. Nilsson
154 Modified : minor compression level adaptations
155 Updated : compression format specification to v0.2.0
156 changed : zstd.h moved to /lib directory
159 Transition version, supporting decoding of v0.8.x
162 Added : homebrew for Mac, by Daniel Cade
163 Added : more examples
164 Fixed : segfault when using small dictionaries, reported by Felix Handte
165 Modified : default compression level for CLI is now 3
166 Updated : specification, to v0.1.1
169 New : compression format specification
170 New : `--` separator, stating that all following arguments are file names. Suggested by Chip Turner.
171 New : `ZSTD_getDecompressedSize()`
172 New : OpenBSD target, by Juan Francisco Cantero Hurtado
173 New : `examples` directory
174 fixed : dictBuilder using HC levels, reported by Bartosz Taudul
175 fixed : legacy support from ZSTD_decompress_usingDDict(), reported by Felix Handte
176 fixed : multi-blocks decoding with intermediate uncompressed blocks, reported by Greg Slazinski
177 modified : removed "mem.h" and "error_public.h" dependencies from "zstd.h" (experimental section)
178 modified : legacy functions no longer need magic number
181 fixed : ZSTD_decompressBlock() using multiple consecutive blocks. Reported by Greg Slazinski.
182 fixed : potential segfault on very large files (many gigabytes). Reported by Chip Turner.
183 fixed : CLI displays system error message when destination file cannot be created (#231). Reported by Chip Turner.
186 fixed : ZBUFF_compressEnd() called multiple times with too small `dst` buffer, reported by Christophe Chevalier
187 fixed : dictBuilder fails if first sample is too small, reported by Руслан Ковалёв
188 fixed : corruption issue, reported by cj
189 modified : checksum enabled by default in command line mode
192 New : Support for directory compression, using `-r`, thanks to Przemyslaw Skibinski
193 New : Command `--rm`, to remove source file after successful de/compression
194 New : Visual build scripts, by Christophe Chevalier
195 New : Support for Sparse File-systems (do not use space for zero-filled sectors)
196 New : Frame checksum support
197 New : Support pass-through mode (when using `-df`)
198 API : more efficient Dictionary API : `ZSTD_compress_usingCDict()`, `ZSTD_decompress_usingDDict()`
199 API : create dictionary files from custom content, by Giuseppe Ottaviano
200 API : support for custom malloc/free functions
201 New : controllable Dictionary ID
202 New : Support for skippable frames
205 New : zlib wrapper API, thanks to Przemyslaw Skibinski
206 New : Ability to compile compressor / decompressor separately
207 Changed : new lib directory structure
208 Fixed : Legacy codec v0.5 compatible with dictionary decompression
209 Fixed : Decoder corruption error (#173)
210 Fixed : null-string roundtrip (#176)
211 New : benchmark mode can select directory as input
212 Experimental : midipix support, VMS support
215 Stronger high compression modes, thanks to Przemyslaw Skibinski
216 API : ZSTD_getFrameParams() provides size of decompressed content
217 New : highest compression modes require `--ultra` command to fully unleash their capacity
218 Fixed : zstd cli return error code > 0 and removes dst file artifact when decompression fails, thanks to Chip Turner
221 New : Optimal parsing => Very high compression modes, thanks to Przemyslaw Skibinski
222 Changed : Dictionary builder integrated into libzstd and zstd cli
223 Changed (!) : zstd cli now uses "multiple input files" as default mode. See `zstd -h`.
224 Fix : high compression modes for big-endian platforms
225 New : zstd cli : `-t` | `--test` command
228 New : dictionary builder utility
229 Changed : streaming & dictionary API
230 Improved : better compression of small data
233 Improved : small compression speed improvement in HC mode
234 Changed : `zstd_decompress.c` has ZSTD_LEGACY_SUPPORT to 0 by default
238 fix : fast compression mode on Windows
239 New : cmake configuration file, thanks to Artyom Dymchenko
240 Improved : high compression mode on repetitive data
241 New : block-level API
242 New : ZSTD_duplicateCCtx()
245 new : -m/--multiple : compress/decompress multiple files
248 Fixed : high compression modes for Windows 32 bits
249 new : external dictionary API extended to buffered mode and accessible through command line
250 new : windows DLL project, thanks to Christophe Chevalier
253 new : external dictionary API
257 Generic minor improvements for small blocks
258 Fixed : big-endian compatibility, by Peter Harris (#85)
261 Fixed : ZSTD_LEGACY_SUPPORT=0 build mode (reported by Luben)
265 Command line utility compatible with high compression levels
266 Removed zstdhc => merged into zstd
267 Added : ZBUFF API (see zstd_buffered.h)
268 Rolling buffer support
274 minor generic compression improvements
280 Small compression ratio improvement
286 Small compression ratio improvement
289 HC mode : compression levels 2-26
292 Fix : Visual Studio 2013 & 2015 release compilation, by Christophe Chevalier
295 Fix : Read errors, advanced fuzzer tests, by Hanno Böck
298 **Breaking format change**
299 Faster decompression speed
300 Can still decode v0.1 format
303 fix uninitialization warning, reported by Evan Nemerson
306 frame concatenation support
310 detects write-flush errors