Performance: Cube with an empty _Process method is slow in debugger but fast in exported binary

[warappa]

Performance: Cube with an empty _Process method is slow in debugger but fast in exported binary

[Hilderin]

I investigated a similar problem for the issue #89217

The problem seems the way the engine calls the C# methods. There are a lot of string comparisons to check which method to call in the generated C# partial class.

Example:

[global::System.ComponentModel.EditorBrowsable(global::System.ComponentModel.EditorBrowsableState.Never)]
protected override bool InvokeGodotClassMethod(in godot_string_name method, NativeVariantPtrArgs args, out godot_variant ret)
{
    if (method == MethodName._Process && args.Count == 1) {
        _Process(global::Godot.NativeInterop.VariantUtils.ConvertTo<double>(args[0]));
        ret = default;
        return true;
    }
    return base.InvokeGodotClassMethod(method, args, out ret);
}

I did not create a PR because it needs quite a lot of modifications to execute calls from delegates or pointer functions but I made it work. I still need to do some testing and adjustments. I'll continue to work on it and keep you updated.

[warappa]

Yes, even with just a completely empty method it has this performance issues.

public partial class SimpleCube : MeshInstance3D
{
    public override void _Process(double delta)
    {
    }
}

[AThousandShips]

Does it happen if you remove the base._Process? I don't think it's needed here as _Process is handled by the engine itself and doesn't rely on virtual methods (none of the code templates or official demos use the parent call)