Worksheet_Change setting target range is slow - vba

Question

I have an excel macro used to manage button visibility in Excel in the "Worksheet_Change" function based from another SO question here.
The problem is the although the macro works it makes updating the Excel sheet rather laggy. I have managed to pin down the slowness to a single line:
Set rUpdated = Range(Target.Dependents.Address)
This sets the range of cells updated to a variable to be iterated through later in the script. If I call a script with just this line I found this is where all the delay is. It seems a rather simple line, but is there a better way to do it?
Full disclosure:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rUpdated As Range
Dim shp As Shape
Dim rCell As Range
Set rUpdated = Range(Target.Dependents.Address)
If Not rUpdated Is Nothing Then
For Each rCell In rUpdated
If rCell.Column = 1 Then
'Look at each shape in the sheet and cross-reference with rCell.
For Each shp In Target.Parent.Shapes
If shp.TopLeftCell.Row = rCell.Row Then
shp.Visible = (rCell.Value <> "")
Exit For 'Exit the loop - the correct button has been found.
End If
Next shp
End If
Next rCell
End If
End Sub

Answer 1

So if i understood it correctly you want to make a button visible if the cell in the row as been changed. The only things i can think of to slow it down are, that is has to check many rCell or Shapes. I dont know what the structure of your document is. So my Idea would be: instead of going through all shapes every time, i would name them in a pattern that you can identify them with the row they are in so you use the name to address them (i.e Row2 for the Button in Row 2).
Private Sub Worksheet_Change(ByVal Target As Range)
Dim rUpdated As Range
Dim shp As Shape
Dim rCell As Range
Dim obj As OLEObject
Set rUpdated = Range(Target.Dependents.Address)
If Not rUpdated Is Nothing Then
For Each rCell In rUpdated
If rCell.Column = 1 Then
On Error Resume Next
Set obj = ActiveSheet.OLEObjects("Row" & rCell.Row)
If Err.Number = 0 Then
obj.Visible = (rCell.Value <> "")
End If
End If
Next rCell
End If
End Sub

Answer 2

I replaced that config with the following single line (and companion line):
On Error Resume Next
ActiveSheet.Shapes("buttonRow" & Target.Row).Visible = (ActiveSheet.Cells(Target.Row, 1).Value <> "")
However to get this to work I first needed to rename all my shapes. I used this function to do that:
Function renamebuttons()
For Each shp In ActiveSheet.Shapes
shp.name = "buttonRow" & shp.TopLeftCell.Row
Next shp
End Function
I ran that function once and deleted it. Once done my shapes can now be referred to by name and I no longer incur the delay of cycling through every shape and every target dependent. The delay experienced in the worksheet is now minimal.