ZstdSharp

ZstdSharp is a port of zstd compression library to С#
Based on Zstandard v1.5.5
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 data:

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

Decompress data:

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

Streaming compression:

using var input = File.OpenRead("dickens");
using var output = File.OpenWrite("dickens.zst");
using var compressionStream = new CompressionStream(output, level);
input.CopyTo(compressionStream);

Streaming decompression:

using var input = File.OpenRead("dickens.zst");
using var output = File.OpenWrite("dickens");
using var decompressionStream = new DecompressionStream(input);
decompressionStream.CopyTo(output);

Multi-threaded compression:

using var input = File.OpenRead("dickens");
using var output = File.OpenWrite("dickens.zst");
using var compressionStream = new CompressionStream(output, level);
compressionStream.SetParameter(ZSTD_cParameter.ZSTD_c_nbWorkers, Environment.ProcessorCount);
input.CopyTo(compressionStream);

Benchmark

Best performance is achieved on .NET. 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 v0.13.10, Windows 10 (10.0.19045.3693/22H2/2022Update)
12th Gen Intel Core i7-12700, 1 CPU, 20 logical and 12 physical cores
.NET SDK 8.0.100
  [Host]     : .NET 8.0.0 (8.0.23.53103), X64 RyuJIT AVX2
  DefaultJob : .NET 8.0.0 (8.0.23.53103), X64 RyuJIT AVX2

Compression level 1

Method	Mean	Error	StdDev	Ratio
CompressNative	24.541 ms	0.0948 ms	0.0887 ms	1.00
CompressSharp	30.003 ms	0.1020 ms	0.0796 ms	1.22
DecompressNative	5.507 ms	0.0587 ms	0.0549 ms	1.00
DecompressSharp	6.503 ms	0.0251 ms	0.0196 ms	1.18

Compression level 5

Method	Mean	Error	StdDev	Ratio
CompressNative	69.568 ms	0.5700 ms	0.5053 ms	1.00
CompressSharp	84.631 ms	0.6347 ms	0.5626 ms	1.22
DecompressNative	6.091 ms	0.0253 ms	0.0236 ms	1.00
DecompressSharp	7.662 ms	0.0071 ms	0.0066 ms	1.26

Compression level 15

Method	Mean	Error	StdDev	Ratio
CompressNative	2,233.266 ms	9.9060 ms	9.2661 ms	1.00
CompressSharp	2,018.259 ms	4.0816 ms	3.4083 ms	0.90
DecompressNative	5.318 ms	0.0284 ms	0.0252 ms	1.00
DecompressSharp	6.309 ms	0.0188 ms	0.0167 ms	1.19