A super fast implementation of the MurmurHash3 algorithm with zero heap allocations.
The initial implementation was based on https://github.com/odinmillion/MurmurHash.Net. Except for the magic constants there is not much left of the original implementation.
Get MurmurHash on NuGet: https://www.nuget.org/packages/JeremyEspresso.MurmurHash
using MurmurHash;
string input = "Hello World!";
const uint seed = 420;
ReadOnlySpan<byte> inputSpan = Encoding.UTF8.GetBytes(input).AsSpan();
uint hash = MurmurHash3.Hash32(ref inputSpan, seed);
Console.WriteLine(hash);Output:
1535517821
BenchmarkDotNet=v0.13.3, OS=Windows 10 (10.0.19045.2364)
Intel Core i7-9700K CPU 3.60GHz (Coffee Lake), 1 CPU, 8 logical and 8 physical cores
.NET SDK=7.0.101
[Host] : .NET 7.0.1 (7.0.122.56804), X64 RyuJIT AVX2
DefaultJob : .NET 7.0.1 (7.0.122.56804), X64 RyuJIT AVX2| Method | StringInput | Mean | Error | StdDev | Allocated |
|---|---|---|---|---|---|
| MurMurHash3 | !zhg(...)9N!% [128] | 28.540 ns | 0.6031 ns | 0.9909 ns | - |
| OdinMillion_MurMurHashDotNet | !zhg(...)9N!% [128] | 39.308 ns | 0.8142 ns | 1.1934 ns | - |
| MurMurHash3 | a$6aj(...)5HFPe [40] | 9.142 ns | 0.2075 ns | 0.2625 ns | - |
| OdinMillion_MurMurHashDotNet | a$6aj(...)5HFPe [40] | 12.032 ns | 0.2711 ns | 0.3620 ns | - |
| MurMurHash3 | key | 1.801 ns | 0.0643 ns | 0.0858 ns | - |
| OdinMillion_MurMurHashDotNet | key | 4.415 ns | 0.1052 ns | 0.1542 ns | - |