Здравствуйте, Sinclair, Вы писали:

Мой старичок показывает такие показометры, в целом повторяя наблюдения (кроме CachedLinqSauvolaScalar):

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.388 (2004/?/20H1)
Intel Core i7-4770 CPU 3.40GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=5.0.100-preview.6.20318.15
  [Host]     : .NET Core 3.1.6 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.31603), X64 RyuJIT
  DefaultJob : .NET Core 3.1.6 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.31603), X64 RyuJIT


|                  Method | WHalf |   FileName |       Mean |   Error |  StdDev | Ratio |
|------------------------ |------ |----------- |-----------:|--------:|--------:|------:|
|             SafeSauvola |     5 | p00743.bmp | 1,290.8 ms | 4.50 ms | 4.21 ms |  1.80 |
|     UnsafeSauvolaScalar |     5 | p00743.bmp |   718.5 ms | 5.46 ms | 5.10 ms |  1.00 |
|       LinqSauvolaVector |     5 | p00743.bmp | 1,167.0 ms | 5.14 ms | 4.30 ms |  1.62 |
|       LinqSauvolaScalar |     5 | p00743.bmp | 1,293.6 ms | 6.25 ms | 5.84 ms |  1.80 |
| CachedLinqSauvolaVector |     5 | p00743.bmp |   694.3 ms | 4.94 ms | 4.63 ms |  0.97 |
| CachedLinqSauvolaScalar |     5 | p00743.bmp |   825.1 ms | 6.13 ms | 5.73 ms |  1.15 |

А вот, ещё .NET 5 preview:

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.388 (2004/?/20H1)
Intel Core i7-4770 CPU 3.40GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=5.0.100-preview.6.20318.15
  [Host]     : .NET Core 3.1.6 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.31603), X64 RyuJIT
  Job-HMFQFC : .NET Core 5.0.0 (CoreCLR 5.0.20.30506, CoreFX 5.0.20.30506), X64 RyuJIT

Runtime=.NET Core 5.0  Toolchain=netcoreapp50

|                  Method | WHalf |   FileName |       Mean |   Error |  StdDev | Ratio | RatioSD |
|------------------------ |------ |----------- |-----------:|--------:|--------:|------:|--------:|
|             SafeSauvola |     5 | p00743.bmp | 1,242.5 ms | 5.74 ms | 4.79 ms |  1.84 |    0.01 |
|     UnsafeSauvolaScalar |     5 | p00743.bmp |   674.4 ms | 5.80 ms | 5.43 ms |  1.00 |    0.00 |
|       LinqSauvolaVector |     5 | p00743.bmp | 1,107.7 ms | 8.42 ms | 7.46 ms |  1.64 |    0.02 |
|       LinqSauvolaScalar |     5 | p00743.bmp | 1,209.5 ms | 6.75 ms | 5.64 ms |  1.79 |    0.01 |
| CachedLinqSauvolaVector |     5 | p00743.bmp |   625.2 ms | 5.65 ms | 5.01 ms |  0.93 |    0.01 |
| CachedLinqSauvolaScalar |     5 | p00743.bmp |   778.4 ms | 5.66 ms | 5.02 ms |  1.15 |    0.00 |

Получается что UnsafeSauvolaScalar — по прежнему очень и очень хорош.