Lz4

perf: large decompression speed improvement on x86/x64 (up to +20%) by djwatson
api : changed : _destSize() compression variants are promoted to stable API
api : new : LZ4_initStream(HC), replacing LZ4_resetStream(HC)
api : changed : LZ4_resetStream(HC) as recommended reset function, for better performance on small data
cli : support custom block sizes, by blezsan
build: source code can be amalgamated, by Bing Xu
build: added meson build, by lzutao
build: new build macros : LZ4_DISTANCE_MAX, LZ4_FAST_DEC_LOOP
install: MidnightBSD, by laffer1
install: msys2 on Windows 10, by vtorri

perf: minor decompression speed improvement (~+2%) with gcc
fix : corruption in v1.8.2 at level 9 for files > 64KB under rare conditions (560)
cli : new command --fast, by jennifermliu
cli : fixed elapsed time, and added cpu load indicator (on -vv) (555)
api : LZ4_decompress_safe_partial() now decodes exactly the nb of bytes requested (feature request 566)
build : added Haiku target, by fbrosson, and MidnightBSD, by laffer1
doc : updated documentation regarding dictionary compression

perf: *much* faster dictionary compression on small files, by felixhandte
perf: improved decompression speed and binary size, by Alexey Tourbin (svpv)
perf: slightly faster HC compression and decompression speed
perf: very small compression ratio improvement
fix : compression compatible with low memory addresses (< 0xFFFF)
fix : decompression segfault when provided with NULL input, by terrelln
cli : new command --favor-decSpeed
cli : benchmark mode more accurate for small inputs
fullbench : can bench _destSize() variants, by felixhandte
doc : clarified block format parsing restrictions, by Alexey Tourbin (svpv)

perf : faster and stronger ultra modes (levels 10+)
perf : slightly faster compression and decompression speed
perf : fix bad degenerative case, reported by c-morgenstern
fix : decompression failed when using a combination of extDict + low memory address (397), reported and fixed by Julian Scheid (jscheid)
cli : support for dictionary compression (`-D`), by Felix Handte felixhandte
cli : fix : `lz4 -d --rm` preserves timestamp (441)
cli : fix : do not modify /dev/null permission as root, by aliceatlas
api : `_destSize()` variant supported for all compression levels
build : `make` and `make test` compatible with `-jX`, reported by mwgamera
build : can control LZ4LIB_VISIBILITY macro, by mikir
install: fix man page directory (387), reported by Stuart Cardall (itoffshore)

cli : fix : do not modify /dev/null permissions, reported by Maokaman1
cli : added GNU separator -- specifying that all following arguments are files
API : added LZ4_compress_HC_destSize(), by Oleg (remittor)
API : added LZ4F_resetDecompressionContext()
API : lz4frame : negative compression levels trigger fast acceleration, request by Lawrence Chan
API : lz4frame : can control block checksum and dictionary ID
API : fix : expose obsolete decoding functions, reported by Chen Yufei
API : experimental : lz4frame_static : new dictionary compression API
build : fix : static lib installation, by Ido Rosen
build : dragonFlyBSD, OpenBSD, NetBSD supported
build : LZ4_MEMORY_USAGE can be modified at compile time, through external define
doc : Updated LZ4 Frame format to v1.6.0, restoring Dictionary-ID field
doc : lz4 api manual, by Przemyslaw Skibinski

lz4hc : new high compression mode : levels 10-12 compress more and slower, by Przemyslaw Skibinski
lz4cat : fix : works with relative path (284) and stdin (285) (reported by beiDei8z)
cli : fix minor notification when using -r recursive mode
API : lz4frame : LZ4F_frameBound(0) gives upper bound of *flush() and *End() operations (290, 280)
doc : markdown version of man page, by Takayuki Matsuoka (279)
build : Makefile : fix make -jX lib+exe concurrency (277)
build : cmake : improvements by Michał Górny (296)