Automate Excel faster

Turn off Screen Updating

Application.ScreenUpdating = False
at the end:
Application.ScreenUpdating = True

Turn On Manual calculation

Sub GoToManual()

Dim xlCalc As XlCalculation

xlCalc = Application.Calculation

Application.Calculation = xlCalculationManual

On Error GoTo CalcBack

‘YOUR CODE

Application.Calculation = xlCalc

Exit Sub

CalcBack:

Application.Calculation = xlCalc

End Sub