Question

In an application where performance is crucial, would there be any noticeable advantage of Scenario 1 (completely separate constructors) vs. Scenario 2 (chain-calling constructors)?

Scenario 1

Class TwoInts

    Private a, b As Integer

    Public Sub New(ByVal a As Integer, ByVal b As Integer)
        Me.a = a
        Me.b = b
    End Sub

    Public Sub New(ByVal a As Integer)
        Me.a = a
        Me.b = 0
    End Sub

    Public Sub New()
        Me.a = 0
        Me.b = 0
    End Sub

End Class

Scenario 2

Class TwoInts

    Private a, b As Integer

    Public Sub New(ByVal a As Integer, ByVal b As Integer)
        Me.a = a
        Me.b = b
    End Sub

    Public Sub New(ByVal a As Integer)
        Me.New(a, 0)
    End Sub

    Public Sub New()
        Me.New(0)
    End Sub

End Class

Answer 1

No, there wouldn’t be a noticeable difference.

You can run your own benchmark and find out.