BenchmarkDotNet v0.14.0, Ubuntu 22.04.4 LTS (Jammy Jellyfish)
AMD EPYC 7763, 1 CPU, 4 logical and 2 physical cores
.NET SDK 8.0.401
  [Host]     : .NET 8.0.8 (8.0.824.36612), X64 RyuJIT AVX2
  DefaultJob : .NET 8.0.8 (8.0.824.36612), X64 RyuJIT AVX2

| Method          | command              | Mean       | Error     | StdDev    | Median     | Ratio | RatioSD | Gen0   | Allocated | Alloc Ratio |
|---------------- |--------------------- |-----------:|----------:|----------:|-----------:|------:|--------:|-------:|----------:|------------:|
| Sequential      | go infinite          | 1,889.8 ns |  22.33 ns |  19.80 ns | 1,883.3 ns |  1.00 |    0.01 |      - |     272 B |        1.00 |
| Parallel        | go infinite          | 3,257.4 ns |  63.33 ns | 132.20 ns | 3,232.4 ns |  1.72 |    0.07 | 0.0191 |    1826 B |        6.71 |
| CapturingGroups | go infinite          | 1,577.6 ns |   5.56 ns |   4.34 ns | 1,577.9 ns |  0.83 |    0.01 | 0.0172 |    1504 B |        5.53 |
| NoRegex         | go infinite          |   868.0 ns |  10.13 ns |   9.47 ns |   864.2 ns |  0.46 |    0.01 | 0.0029 |     272 B |        1.00 |
|                 |                      |            |           |           |            |       |         |        |           |             |
| Sequential      | go wt(...)c 500 [42] | 4,330.4 ns |  52.75 ns |  49.34 ns | 4,327.7 ns |  1.00 |    0.02 | 0.0076 |    1248 B |        1.00 |
| Parallel        | go wt(...)c 500 [42] | 4,263.0 ns |  82.61 ns | 234.34 ns | 4,185.8 ns |  0.98 |    0.05 | 0.0305 |    2808 B |        2.25 |
| CapturingGroups | go wt(...)c 500 [42] | 3,883.5 ns |  22.45 ns |  21.00 ns | 3,885.4 ns |  0.90 |    0.01 | 0.0534 |    4800 B |        3.85 |
| NoRegex         | go wt(...)c 500 [42] | 1,011.2 ns |   6.44 ns |   6.02 ns | 1,010.5 ns |  0.23 |    0.00 | 0.0019 |     272 B |        0.22 |
|                 |                      |            |           |           |            |       |         |        |           |             |
| Sequential      | go wt(...)00000 [78] | 5,401.7 ns | 101.28 ns |  94.74 ns | 5,400.7 ns |  1.00 |    0.02 | 0.0153 |    1728 B |        1.00 |
| Parallel        | go wt(...)00000 [78] | 5,129.1 ns | 101.88 ns | 125.11 ns | 5,122.6 ns |  0.95 |    0.03 | 0.0381 |    3288 B |        1.90 |
| CapturingGroups | go wt(...)00000 [78] | 5,515.9 ns | 105.29 ns | 103.41 ns | 5,489.9 ns |  1.02 |    0.03 | 0.0839 |    7064 B |        4.09 |
| NoRegex         | go wt(...)00000 [78] | 1,179.3 ns |  10.16 ns |   9.01 ns | 1,179.2 ns |  0.22 |    0.00 | 0.0019 |     272 B |        0.16 |
|                 |                      |            |           |           |            |       |         |        |           |             |
| Sequential      | go wt(...)go 40 [62] | 5,020.1 ns |  67.46 ns |  63.10 ns | 5,036.3 ns |  1.00 |    0.02 | 0.0153 |    1488 B |        1.00 |
| Parallel        | go wt(...)go 40 [62] | 4,559.2 ns |  90.55 ns | 190.99 ns | 4,537.0 ns |  0.91 |    0.04 | 0.0305 |    3048 B |        2.05 |
| CapturingGroups | go wt(...)go 40 [62] | 5,236.4 ns |  62.20 ns |  55.14 ns | 5,242.3 ns |  1.04 |    0.02 | 0.0839 |    7032 B |        4.73 |
| NoRegex         | go wt(...)go 40 [62] | 1,089.1 ns |   4.17 ns |   3.90 ns | 1,088.7 ns |  0.22 |    0.00 | 0.0019 |     272 B |        0.18 |

Test  | perf/go-parsing
Elo   | -6.95 +- 19.86 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=32MB
LLR   | -0.17 (-2.25, 2.89) [-5.00, 0.00]
Games | 500: +133 -143 =224
Penta | [16, 55, 110, 61, 8]
https://openbench.lynx-chess.com/test/716/