Extremely fast MurmurHash3 implementation with zero heap allocations

This is a fork of the System.Data.HashFunction.MurmurHash.

• Faster (zero heap allocations via Spans, reduced class inheritance, bytes to uint conversion optimisations)
• Only 32-bit output hash value. Maybe 128-bit will be supported in the future. But you can implement it by yourself and send me PR :)

This project is available as a NuGet package

uint hash = MurmurHash3.Hash32(bytes: new byte[]{1,2,3}, seed: 123456U);
Console.WriteLine(hash);

3800434721

ReadOnlySpan<byte> span = ...
uint hash = MurmurHash3.Hash32(bytes: span, seed: 123456U);

// * Summary *

BenchmarkDotNet=v0.12.0, OS=macOS Mojave 10.14.6 (18G103) [Darwin 18.7.0]
Intel Core i7-7660U CPU 2.50GHz (Kaby Lake), 1 CPU, 4 logical and 2 physical cores
.NET Core SDK=3.1.100
  [Host]     : .NET Core 3.1.0 (CoreCLR 4.700.19.56402, CoreFX 4.700.19.56404), X64 RyuJIT
  DefaultJob : .NET Core 3.1.0 (CoreCLR 4.700.19.56402, CoreFX 4.700.19.56404), X64 RyuJIT

• CRC32 - https://www.nuget.org/packages/Crc32/1.1.0
• XxHash - https://www.nuget.org/packages/System.Data.HashFunction.xxHash/2.0.0
• MurMurHashByDarrenkopp - https://www.nuget.org/packages/murmurhash/1.0.3
• Blake2B - https://www.nuget.org/packages/SauceControl.Blake2Fast/1.0.0
• MurMurHashNet - https://www.nuget.org/packages/MurmurHash.Net/0.0.1 (this repo)