StringsVsStructs.cs

[MediumRunJob]
[MemoryDiagnoser]
public class ToTest
{
    Dictionary<string,IntPtr> stringKeys = new();
    Dictionary<TileKey,IntPtr> structKeys = new();

    public ToTest()
    {
        for (int x = -4; x < 5; x++)
            for (int y = -4; y < 5; y++)
                for (int z = -4; z < 5; z++)
                {
                    stringKeys[$"{x}_{y}_{z}"] = IntPtr.Zero;
                    structKeys[new TileKey(x,y,z)] = IntPtr.Zero;
                }
    }
    
    [Benchmark]
    public IntPtr WithStringKeys()
    {
        IntPtr temp = default;
        for (int x = -4; x < 5; x++)
            for (int y = -4; y < 5; y++)
                for (int z = -4; z < 5; z++)
                    temp = stringKeys[$"{x}_{y}_{z}"];
        return temp;
    }

    [Benchmark]
    public IntPtr WithStructKeys()
    {
        IntPtr temp = default;
        for (int x = -4; x < 5; x++)
            for (int y = -4; y < 5; y++)
                for (int z = -4; z < 5; z++)
                    temp = structKeys[new TileKey(x,y,z)];
        return temp;
    }

    public readonly record struct TileKey(double X, double Y, double Z);
}