ZstdSharp

ZstdSharp is a port of zstd compression library to С#
Based on Zstandard v1.5.2
Supports .NET Core 3.1, .NET 5, .NET 6, .NET Standard 2.0+, .NET Framework 4.6.1+

Usage

ZstdSharp has an unsafe API much the same as zstd.
There are also safe wrappers.

Compress:

var src = File.ReadAllBytes("dickens");
using var compressor = new Compressor(level);
var compressed = compressor.Wrap(src);

Decompress:

var src = File.ReadAllBytes("dickens.zst");
using var decompressor = new Decompressor();
var decompressed = decompressor.Unwrap(src);

Benchmark

Best performance is achieved on .NET Core. System.Runtime.Intrinsics namespace is required for hardware accelerated bit and vector operations. .NET Standard and .NET Framework will use software implementation

Comparision zstd (native) and ZstdSharp

BenchmarkDotNet=v0.13.2, OS=Windows 10 (10.0.19044.2251/21H2/November2021Update)
12th Gen Intel Core i7-12700, 1 CPU, 20 logical and 12 physical cores
.NET SDK=7.0.100
  [Host]     : .NET 7.0.0 (7.0.22.51805), X64 RyuJIT AVX2
  DefaultJob : .NET 7.0.0 (7.0.22.51805), X64 RyuJIT AVX2

Compression level 1

Method	Mean	Error	StdDev	Ratio	RatioSD	InstructionRetired/Op
CompressNative	26.554 ms	0.2640 ms	0.2470 ms	1.00	0.00	397,460,417
CompressSharp	35.132 ms	0.2346 ms	0.2194 ms	1.32	0.02	492,346,667
DecompressNative	7.096 ms	0.0404 ms	0.0358 ms	1.00	0.00	154,629,167
DecompressSharp	8.088 ms	0.0866 ms	0.0723 ms	1.14	0.01	185,760,417

Compression level 5

Method	Mean	Error	StdDev	Ratio	RatioSD	InstructionRetired/Op
CompressNative	82.992 ms	1.2924 ms	1.1456 ms	1.00	0.00	1,099,049,020
CompressSharp	99.465 ms	1.1068 ms	0.8641 ms	1.20	0.02	1,475,813,333
DecompressNative	8.322 ms	0.1591 ms	0.1954 ms	1.00	0.00	205,625,000
DecompressSharp	10.257 ms	0.1346 ms	0.1259 ms	1.23	0.04	257,361,458