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Conrad Meyer 37f1f2684f Update to Zstandard 1.4.5 
As usual, the full release notes are found on Github:

  https://github.com/facebook/zstd/releases/tag/v1.4.5

Notable changes include:

* Improved decompress performance on amd64 and arm (5-10%
  and 15-50%, respectively).
* '--patch-from' zstd(1) CLI option, which provides something like a very fast
  version of bspatch(1) with slightly worse compression.  See release notes.

In this update, I dropped the 3-year old -O0 workaround for an LLVM ARM bug;
the bug was fixed in LLVM SVN in 2017, but we didn't remove this workaround
from our tree until now.

MFC after:	I won't, but feel free
Relnotes:	yes
2020-05-23 21:23:46 +00:00
..
common.h Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
dictionary_compression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
dictionary_decompression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
Makefile Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
multiple_simple_compression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
multiple_streaming_compression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
README.md
simple_compression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
simple_decompression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
streaming_compression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
streaming_decompression.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
streaming_memory_usage.c Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00

README.md

Zstandard library : usage examples

  • Simple compression : Compress a single file. Introduces usage of : ZSTD_compress()

  • Simple decompression : Decompress a single file. Only compatible with simple compression. Result remains in memory. Introduces usage of : ZSTD_decompress()

  • Multiple simple compression : Compress multiple files (in simple mode) in a single command line. Demonstrates memory preservation technique that minimizes malloc()/free() calls by re-using existing resources. Introduces usage of : ZSTD_compressCCtx()

  • Streaming memory usage : Provides amount of memory used by streaming context. Introduces usage of : ZSTD_sizeof_CStream()

  • Streaming compression : Compress a single file. Introduces usage of : ZSTD_compressStream()

  • Multiple Streaming compression : Compress multiple files (in streaming mode) in a single command line. Introduces memory usage preservation technique, reducing impact of malloc()/free() and memset() by re-using existing resources.

  • Streaming decompression : Decompress a single file compressed by zstd. Compatible with both simple and streaming compression. Result is sent to stdout. Introduces usage of : ZSTD_decompressStream()

  • Dictionary compression : Compress multiple files using the same dictionary. Introduces usage of : ZSTD_createCDict() and ZSTD_compress_usingCDict()

  • Dictionary decompression : Decompress multiple files using the same dictionary. Result remains in memory. Introduces usage of : ZSTD_createDDict() and ZSTD_decompress_usingDDict()