v1.1.2
Improved : faster decompression speed at ultra compression settings and in 32-bits mode
cli : new : gzstd, experimental version able to decode .gz files, by Przemyslaw Skibinski
cli : new : preserve file attributes
cli : new : added zstdless and zstdgrep tools
cli : fixed : status displays total amount decoded, even for file consisting of multiple frames (like pzstd)
cli : fixed : zstdcat
API : changed : zbuff prototypes now generate deprecation warnings
API : changed : streaming decompression implicit reset on starting new frame
API : added experimental : dictID retrieval functions
zlib_wrapper : added support for gz* functions, by Przemyslaw Skibinski
Changed : zbuff source files moved to lib/deprecated
Changed : reduced stack memory use

v1.1.1
New : command -M#, --memory=, --memlimit=, --memlimit-decompress= to limit allowed memory consumption
New : doc/zstd_manual.html, by Przemyslaw Skibinski
Improved : slightly better compression ratio at --ultra levels (>= 20)
Improved : better memory usage when using streaming compression API, thanks to @Rogier-5 report
Added : API : ZSTD_initCStream_usingCDict(), ZSTD_initDStream_usingDDict() (experimental section)
Added : example/multiple_streaming_compression.c
Changed : zstd_errors.h is now installed within /include (and replaces errors_public.h)
Updated man page
Fixed : zstd-small, zstd-compress and zstd-decompress compilation targets

v1.1.0
New : contrib/pzstd, parallel version of zstd, by Nick Terrell
added : NetBSD install target (#338)
Improved : speed for batches of small files
Improved : speed of zlib wrapper, by Przemyslaw Skibinski
Changed : libzstd on Windows supports legacy formats, by Christophe Chevalier
Fixed : CLI -d output to stdout by default when input is stdin (#322)
Fixed : CLI correctly detects console on Mac OS-X
Fixed : CLI supports recursive mode `-r` on Mac OS-X
Fixed : Legacy decoders use unified error codes, reported by benrg (#341), fixed by Przemyslaw Skibinski
Fixed : compatibility with OpenBSD, reported by Juan Francisco Cantero Hurtado (#319)
Fixed : compatibility with Hurd, by Przemyslaw Skibinski (#365)
Fixed : zstd-pgo, reported by octoploid (#329)

v1.0.0
Change Licensing, all project is now BSD, Copyright Facebook
Small decompression speed improvement
API : Streaming API supports legacy format
API : ZDICT_getDictID(), ZSTD_sizeof_{CCtx, DCtx, CStream, DStream}(), ZSTD_setDStreamParamter()
CLI supports legacy formats v0.4+
Fixed : compression fails on certain huge files, reported by Jesse McGrew
Enhanced documentation, by Przemyslaw Skibinski

v0.8.1
New streaming API
Changed : --ultra now enables levels beyond 19
Changed : -i# now selects benchmark time in second
Fixed : ZSTD_compress* can now compress > 4 GB in a single pass, reported by Nick Terrell
Fixed : speed regression on specific patterns (#272)
Fixed : support for Z_SYNC_FLUSH, by Dmitry Krot (#291)
Fixed : ICC compilation, by Przemyslaw Skibinski

v0.8.0
Improved : better speed on clang and gcc -O2, thanks to Eric Biggers
New : Build on FreeBSD and DragonFly, thanks to JrMarino
Changed : modified API : ZSTD_compressEnd()
Fixed : legacy mode with ZSTD_HEAPMODE=0, by Christopher Bergqvist
Fixed : premature end of frame when zero-sized raw block, reported by Eric Biggers
Fixed : large dictionaries (> 384 KB), reported by Ilona Papava
Fixed : checksum correctly checked in single-pass mode
Fixed : combined --test amd --rm, reported by Andreas M. Nilsson
Modified : minor compression level adaptations
Updated : compression format specification to v0.2.0
changed : zstd.h moved to /lib directory

v0.7.5
Transition version, supporting decoding of v0.8.x

v0.7.4
Added : homebrew for Mac, by Daniel Cade
Added : more examples
Fixed : segfault when using small dictionaries, reported by Felix Handte
Modified : default compression level for CLI is now 3
Updated : specification, to v0.1.1

v0.7.3
New : compression format specification
New : `--` separator, stating that all following arguments are file names. Suggested by Chip Turner.
New : `ZSTD_getDecompressedSize()`
New : OpenBSD target, by Juan Francisco Cantero Hurtado
New : `examples` directory
fixed : dictBuilder using HC levels, reported by Bartosz Taudul
fixed : legacy support from ZSTD_decompress_usingDDict(), reported by Felix Handte
fixed : multi-blocks decoding with intermediate uncompressed blocks, reported by Greg Slazinski
modified : removed "mem.h" and "error_public.h" dependencies from "zstd.h" (experimental section)
modified : legacy functions no longer need magic number

v0.7.2
fixed : ZSTD_decompressBlock() using multiple consecutive blocks. Reported by Greg Slazinski.
fixed : potential segfault on very large files (many gigabytes). Reported by Chip Turner.
fixed : CLI displays system error message when destination file cannot be created (#231). Reported by Chip Turner.

v0.7.1
fixed : ZBUFF_compressEnd() called multiple times with too small `dst` buffer, reported by Christophe Chevalier
fixed : dictBuilder fails if first sample is too small, reported by Руслан Ковалёв
fixed : corruption issue, reported by cj
modified : checksum enabled by default in command line mode

v0.7.0
New : Support for directory compression, using `-r`, thanks to Przemyslaw Skibinski
New : Command `--rm`, to remove source file after successful de/compression
New : Visual build scripts, by Christophe Chevalier
New : Support for Sparse File-systems (do not use space for zero-filled sectors)
New : Frame checksum support
New : Support pass-through mode (when using `-df`)
API : more efficient Dictionary API : `ZSTD_compress_usingCDict()`, `ZSTD_decompress_usingDDict()`
API : create dictionary files from custom content, by Giuseppe Ottaviano
API : support for custom malloc/free functions
New : controllable Dictionary ID
New : Support for skippable frames

v0.6.1
New : zlib wrapper API, thanks to Przemyslaw Skibinski
New : Ability to compile compressor / decompressor separately
Changed : new lib directory structure
Fixed : Legacy codec v0.5 compatible with dictionary decompression
Fixed : Decoder corruption error (#173)
Fixed : null-string roundtrip (#176)
New : benchmark mode can select directory as input
Experimental : midipix support, VMS support

v0.6.0
Stronger high compression modes, thanks to Przemyslaw Skibinski
API : ZSTD_getFrameParams() provides size of decompressed content
New : highest compression modes require `--ultra` command to fully unleash their capacity
Fixed : zstd cli return error code > 0 and removes dst file artifact when decompression fails, thanks to Chip Turner

v0.5.1
New : Optimal parsing => Very high compression modes, thanks to Przemyslaw Skibinski
Changed : Dictionary builder integrated into libzstd and zstd cli
Changed (!) : zstd cli now uses "multiple input files" as default mode. See `zstd -h`.
Fix : high compression modes for big-endian platforms
New : zstd cli : `-t` | `--test` command

v0.5.0
New : dictionary builder utility
Changed : streaming & dictionary API
Improved : better compression of small data

v0.4.7
Improved : small compression speed improvement in HC mode
Changed : `zstd_decompress.c` has ZSTD_LEGACY_SUPPORT to 0 by default
fix : bt search bug

v0.4.6
fix : fast compression mode on Windows
New : cmake configuration file, thanks to Artyom Dymchenko
Improved : high compression mode on repetitive data
New : block-level API
New : ZSTD_duplicateCCtx()

v0.4.5
new : -m/--multiple : compress/decompress multiple files

v0.4.4
Fixed : high compression modes for Windows 32 bits
new : external dictionary API extended to buffered mode and accessible through command line
new : windows DLL project, thanks to Christophe Chevalier

v0.4.3 :
new : external dictionary API
new : zstd-frugal

v0.4.2 :
Generic minor improvements for small blocks
Fixed : big-endian compatibility, by Peter Harris (#85)

v0.4.1
Fixed : ZSTD_LEGACY_SUPPORT=0 build mode (reported by Luben)
removed `zstd.c`

v0.4.0
Command line utility compatible with high compression levels
Removed zstdhc => merged into zstd
Added : ZBUFF API (see zstd_buffered.h)
Rolling buffer support

v0.3.6
small blocks params

v0.3.5
minor generic compression improvements

v0.3.4
Faster fast cLevels

v0.3.3
Small compression ratio improvement

v0.3.2
Fixed Visual Studio

v0.3.1 :
Small compression ratio improvement

v0.3
HC mode : compression levels 2-26

v0.2.2
Fix : Visual Studio 2013 & 2015 release compilation, by Christophe Chevalier

v0.2.1
Fix : Read errors, advanced fuzzer tests, by Hanno Böck

v0.2.0
**Breaking format change**
Faster decompression speed
Can still decode v0.1 format

v0.1.3
fix uninitialization warning, reported by Evan Nemerson

v0.1.2
frame concatenation support

v0.1.1
fix compression bug
detects write-flush errors

v0.1.0
first release