gistfile1.txt

using BenchmarkDotNet.Attributes;

[MemoryDiagnoser]
public class ABC
{
    private string[] data;

    [Params(1000, 10000, 100000)]
    public int N;

    [GlobalSetup]
    public void Setup()
    {
        data = new string[N];
        for (var i = 0; i < N/2; ++i)
        {
            data[i] = new Random(42).NextDouble().ToString();
        }
        
        for (var i = N/2+1; i < N; ++i)
        {
            data[i] = Guid.NewGuid().ToString("B").Split('-')[0];
        }

        Random.Shared.Shuffle(data);
    }

    [Benchmark]
    public void Me() => data.MeNonNumericIndexes<double>();

    [Benchmark]
    public void KarenPayne() => data.KarenPayneNonNumericIndexes<double>();
}