ZstdSharp

ZstdSharp is a port of zstd compression library to С#
Based on Zstandard v1.5.0
Supports .NET Core 3.1, .NET 5, .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=v0.12.1, OS=Windows 10.0.19041.1052 (2004/?/20H1)
Intel Core i7-2600K CPU 3.40GHz (Sandy Bridge), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=5.0.204
  [Host]     : .NET Core 5.0.7 (CoreCLR 5.0.721.25508, CoreFX 5.0.721.25508), X64 RyuJIT
  DefaultJob : .NET Core 5.0.7 (CoreCLR 5.0.721.25508, CoreFX 5.0.721.25508), X64 RyuJIT

Compression level 1

Method	Mean	Error	StdDev	Ratio	RatioSD
CompressNative	51.20 ms	1.022 ms	1.621 ms	1.00	0.00
CompressSharp	68.76 ms	1.287 ms	1.074 ms	1.34	0.05
DecompressNative	15.64 ms	0.253 ms	0.224 ms	1.00	0.00
DecompressSharp	20.98 ms	0.253 ms	0.224 ms	1.34	0.02

Compression level 5

Method	Mean	Error	StdDev	Ratio	RatioSD
CompressNative	205.69 ms	3.887 ms	4.159 ms	1.00	0.00
CompressSharp	212.88 ms	2.141 ms	1.898 ms	1.04	0.02
DecompressNative	21.91 ms	0.430 ms	0.528 ms	1.00	0.00
DecompressSharp	27.77 ms	0.528 ms	0.519 ms	1.26	0.03