xxHash
Extremely fast non-cryptographic hash algorithm http://www.xxhash.com/
Benchmark
BenchmarkDotNet=v0.10.13, OS=Windows 10 Redstone 3 [1709, Fall Creators Update] (10.0.16299.309)
Intel Core i7-4700MQ CPU 2.40GHz (Haswell), 1 CPU, 8 logical cores and 4 physical cores
Frequency=2338346 Hz, Resolution=427.6527 ns, Timer=TSC
[Host] : .NET Framework 4.7.1 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.2633.0
DefaultJob : .NET Framework 4.7.1 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.2633.0
Platform (x64)
| Method |
Bytes |
Mean |
Min |
Max |
Allocated |
| Hash32 |
1024 |
179.1 ns |
176.9 ns |
181.5 ns |
0 B |
| Hash64 |
1024 |
112.8 ns |
112.5 ns |
113.1 ns |
0 B |
| Hash32 |
1048576 |
167,038.5 ns |
164,833.0 ns |
168,950.2 ns |
0 B |
| Hash64 |
1048576 |
83,941.7 ns |
82,805.5 ns |
86,072.0 ns |
0 B |
| Hash32 |
1073741824 |
198,183,743.4 ns |
197,721,867.3 ns |
198,782,071.8 ns |
0 B |
| Hash64 |
1073741824 |
112,638,993.1 ns |
111,995,167.3 ns |
113,573,740.3 ns |
0 B |
Platform (x86)
| Method |
Bytes |
Mean |
Min |
Max |
Allocated |
| Hash32 |
1024 |
354.9 ns |
354.5 ns |
355.5 ns |
0 B |
| Hash64 |
1024 |
1,380.3 ns |
1,361.0 ns |
1,398.3 ns |
0 B |
| Hash32 |
1048576 |
357,399.4 ns |
356,245.1 ns |
358,044.0 ns |
0 B |
| Hash64 |
1048576 |
1,343,269.5 ns |
1,340,923.2 ns |
1,345,356.7 ns |
0 B |
| Hash32 |
1073741824 |
365,925,742.3 ns |
360,332,613.3 ns |
369,159,819.6 ns |
0 B |
| Hash64 |
1073741824 |
1,388,585,469.4 ns |
1,368,307,867.2 ns |
1,428,744,362.7 ns |
0 B |
Speed
| Method |
x86 |
x64 |
| Hash32 |
2.73 GB/s |
720 MB/s |
| Hash64 |
5.05 GB/s |
8.92 GB/s |
How to use
byte[] data = Encoding.UTF8.GetBytes("veni vidi vici");
uint hash64 = xxHash64.ComputeHash(data, data.Length);
ulong hash32 = xxHash32.ComputeHash(data, data.Length);
