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 v0.13.10, 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	24.585 ms	0.1306 ms	0.1158 ms	1.00
CompressSharp	29.783 ms	0.0920 ms	0.0719 ms	1.21
DecompressNative	5.754 ms	0.0270 ms	0.0226 ms	1.00
DecompressSharp	6.264 ms	0.0525 ms	0.0491 ms	1.09

Compression level 5

Method	Mean	Error	StdDev	Ratio
CompressNative	69.339 ms	0.5648 ms	0.4716 ms	1.00
CompressSharp	82.499 ms	0.3777 ms	0.3533 ms	1.19
DecompressNative	6.308 ms	0.0508 ms	0.0475 ms	1.00
DecompressSharp	7.308 ms	0.0437 ms	0.0409 ms	1.16

Compression level 15

Method	Mean	Error	StdDev	Ratio
CompressNative	2,265.331 ms	17.3366 ms	16.2166 ms	1.00
CompressSharp	2,041.183 ms	16.9635 ms	15.8677 ms	0.90
DecompressNative	5.461 ms	0.0299 ms	0.0280 ms	1.00
DecompressSharp	6.230 ms	0.0253 ms	0.0237 ms	1.14