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 (10.0.19045.4170/22H2/2022Update)
12th Gen Intel Core i7-12700, 1 CPU, 20 logical and 12 physical cores
.NET SDK 8.0.101
  [Host]     : .NET 8.0.1 (8.0.123.58001), X64 RyuJIT AVX2
  DefaultJob : .NET 8.0.1 (8.0.123.58001), X64 RyuJIT AVX2

Compression level 1

Method	Mean	Error	StdDev	Ratio
CompressNative	24.356 ms	0.1083 ms	0.1013 ms	1.00
CompressSharp	29.433 ms	0.0486 ms	0.0380 ms	1.21
DecompressNative	5.450 ms	0.0173 ms	0.0162 ms	1.00
DecompressSharp	6.200 ms	0.0369 ms	0.0345 ms	1.14

Compression level 5

Method	Mean	Error	StdDev	Ratio
CompressNative	69.554 ms	0.3478 ms	0.3253 ms	1.00
CompressSharp	84.095 ms	0.5404 ms	0.4791 ms	1.21
DecompressNative	6.068 ms	0.0173 ms	0.0153 ms	1.00
DecompressSharp	7.171 ms	0.0458 ms	0.0428 ms	1.18

Compression level 15

Method	Mean	Error	StdDev	Ratio
CompressNative	2,302.852 ms	17.3599 ms	16.2385 ms	1.00
CompressSharp	2,051.227 ms	8.6078 ms	7.6306 ms	0.89
DecompressNative	5.289 ms	0.0207 ms	0.0194 ms	1.00
DecompressSharp	6.050 ms	0.0212 ms	0.0166 ms	1.14