[question] What happens when record struct with explicit layout has members

[Xyncgas]

[<Struct; StructLayout(LayoutKind.Explicit)>]
        type Point2D= 
            {
                [<FieldOffsetAttribute(0)>]
                x : float32
                [<FieldOffsetAttribute(4)>]
                y : float32
            }
            with
            member pt.sum = pt.x + pt.y

does pt.sum computed when this record struct is computed therefore the size of the struct is actually 12 bytes instead of 8 bytes

[Tarmil]

Properties declared as member this.Foo are always computed on demand, so they don't affect the size of this.

Extra fields would be declared with let or member val; but those are forbidden in records.

[Xyncgas]

Thanks