Some quick benchmarks of the RNG algorithms currently implemented for v0.2.
BenchmarkDotNet=v0.12.1, OS=Windows 10.0.18363.1500 (1909/November2018Update/19H2)
Intel Core i7-9700K CPU 3.60GHz (Coffee Lake), 1 CPU, 8 logical and 8 physical cores
.NET Core SDK=5.0.201
[Host] : .NET Core 5.0.4 (CoreCLR 5.0.421.11614, CoreFX 5.0.421.11614), X64 RyuJIT
.NET Framework : .NET Framework 4.8 (4.8.4300.0), X64 RyuJIT
.NET 5, no AVX2 : .NET Core 5.0.4 (CoreCLR 5.0.421.11614, CoreFX 5.0.421.11614), X64 RyuJIT
.NET 5 : .NET Core 5.0.4 (CoreCLR 5.0.421.11614, CoreFX 5.0.421.11614), X64 RyuJIT
Results
| RngUInt64 | .NET Framework | .NET 5, no AVX2 | .NET 5 |
|---|
| ChaCha8 | 187.30 MB/s | 970.70 MB/s | 1,285.57 MB/s |
| ChaCha12 | 147.38 MB/s | 775.92 MB/s | 1,025.21 MB/s |
| ChaCha20 | 101.88 MB/s | 550.32 MB/s | 817.92 MB/s |
| mt19937-64 | 736.41 MB/s | 782.77 MB/s | 829.18 MB/s |
| PCG32 | 1,224.33 MB/s | 1,412.73 MB/s | 1,411.52 MB/s |
| XorShift | 1,333.21 MB/s | 1,464.17 MB/s | 1,411.20 MB/s |
| CryptoServiceProvider | 395.25 MB/s | 763.68 MB/s | 800.41 MB/s |
| System.Random | 218.05 MB/s | 198.68 MB/s | 198.34 MB/s |
| RngUInt32 | .NET Framework | .NET 5, no AVX2 | .NET 5 |
|---|
| ChaCha8 | 224.02 MB/s | 978.46 MB/s | 1,245.75 MB/s |
| ChaCha12 | 168.06 MB/s | 780.89 MB/s | 1,046.13 MB/s |
| ChaCha20 | 111.17 MB/s | 555.50 MB/s | 798.83 MB/s |
| mt19937-64 | 340.66 MB/s | 332.02 MB/s | 345.08 MB/s |
| PCG32 | 2,312.50 MB/s | 2,411.55 MB/s | 2,401.94 MB/s |
| XorShift | 2,280.48 MB/s | 2,509.52 MB/s | 2,511.10 MB/s |
| CryptoServiceProvider | 626.10 MB/s | 706.68 MB/s | 716.98 MB/s |
| System.Random | 216.27 MB/s | 192.77 MB/s | 196.86 MB/s |
| RngFill | .NET Framework | .NET 5, no AVX2 | .NET 5 |
|---|
| ChaCha8 | 260.09 MB/s | 1,780.26 MB/s | 2,850.54 MB/s |
| ChaCha12 | 183.75 MB/s | 1,210.77 MB/s | 1,991.67 MB/s |
| ChaCha20 | 118.57 MB/s | 740.51 MB/s | 1,257.29 MB/s |
| mt19937-64 | 519.36 MB/s | 694.89 MB/s | 696.68 MB/s |
| PCG32 | 716.96 MB/s | 1,067.74 MB/s | 1,129.33 MB/s |
| XorShift | 727.54 MB/s | 1,101.26 MB/s | 1,163.73 MB/s |
| CryptoServiceProvider | 1,652.05 MB/s | 2,310.89* MB/s | 2,291.79 MB/s |
| System.Random | 175.45 MB/s | 132.04 MB/s | 137.85 MB/s |
* Since CryptoServiceProvider relies on an external CSPRNG, disabling AVX2 for .NET likely has no effect.