ZstdSharp

ZstdSharp is a port of zstd compression library to С#
Based on Zstandard v1.5.6
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 v0.14.0, Windows 10 (10.0.19045.5011/22H2/2022Update)
12th Gen Intel Core i7-12700, 1 CPU, 20 logical and 12 physical cores
.NET SDK 9.0.100
  [Host]   : .NET 8.0.11 (8.0.1124.51707), X64 RyuJIT AVX2
  .NET 9.0 : .NET 9.0.0 (9.0.24.52809), X64 RyuJIT AVX2

Compression level 1

Method	Mean	Error	StdDev	Ratio
CompressNative	24.596 ms	0.0341 ms	0.0285 ms	1.00
CompressSharp	25.318 ms	0.0329 ms	0.0275 ms	1.03
DecompressNative	5.642 ms	0.0145 ms	0.0128 ms	1.00
DecompressSharp	5.896 ms	0.0053 ms	0.0045 ms	1.05

Compression level 5

Method	Mean	Error	StdDev	Ratio
CompressNative	69.903 ms	0.3729 ms	0.3306 ms	1.00
CompressSharp	78.997 ms	0.1981 ms	0.1756 ms	1.13
DecompressNative	6.214 ms	0.0154 ms	0.0137 ms	1.00
DecompressSharp	6.746 ms	0.0083 ms	0.0069 ms	1.09

Compression level 15

Method	Mean	Error	StdDev	Ratio
CompressNative	2,237.101 ms	10.1419 ms	9.4868 ms	1.00
CompressSharp	2,008.744 ms	6.2452 ms	5.5362 ms	0.90
DecompressNative	5.385 ms	0.0088 ms	0.0074 ms	1.00
DecompressSharp	5.687 ms	0.0203 ms	0.0180 ms	1.06