ZstdSharp

ZstdSharp is a port of zstd compression library to С#
Based on Zstandard v1.5.2
Supports .NET Core 3.1, .NET 5, .NET 6, .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=v0.13.1, OS=Windows 10.0.19044.1566 (21H2)
12th Gen Intel Core i7-12700, 1 CPU, 20 logical and 12 physical cores
.NET SDK=6.0.200
  [Host]     : .NET 6.0.2 (6.0.222.6406), X64 RyuJIT
  DefaultJob : .NET 6.0.2 (6.0.222.6406), X64 RyuJIT

Compression level 1

Method	Mean	Error	StdDev	Ratio	InstructionRetired/Op
CompressNative	25.565 ms	0.2983 ms	0.2491 ms	1.00	397,370,833
CompressSharp	35.616 ms	0.0593 ms	0.0495 ms	1.39	523,222,222
DecompressNative	6.821 ms	0.0097 ms	0.0086 ms	1.00	154,583,333
DecompressSharp	8.178 ms	0.0198 ms	0.0176 ms	1.20	184,807,292

Compression level 5

Method	Mean	Error	StdDev	Ratio	RatioSD	InstructionRetired/Op
CompressNative	79.408 ms	0.1196 ms	0.0933 ms	1.00	0.00	1,096,971,429
CompressSharp	96.018 ms	0.3943 ms	0.3292 ms	1.21	0.00	1,528,277,778
DecompressNative	8.156 ms	0.1620 ms	0.1663 ms	1.00	0.00	205,591,912
DecompressSharp	10.637 ms	0.0937 ms	0.0831 ms	1.31	0.03	250,476,042