Reduce time taken for VBA loop

sjedi

New Member
Joined
Dec 8, 2019
Messages
14
Office Version
  1. 2016
Platform
  1. Windows
My VBA code currently loops for 5,000 iterations and takes about 25 minutes to collect the output data in the Output excel sheet. Is there a way to reduce the time taken for instance by improving the copying and pasting of values, collecting the output data in some kind of array etc.? Given that I will be looping it for up to 10,000 iterations when I obtain more data
Note: The calculations are excel formulas within the Calcs excel sheet, as this is a cash flow schedule with irregular cash flows and discount rates, hence I am unable to automate the cash flow calculations via VBA.
VBA Code:
Sub x()

Dim r As Long
Dim lastrow As Long

Application.ScreenUpdating = False
Application.CutCopyMode = False

With Worksheets("MCInput")
lastrow = .Cells(.Rows.Count, "B").End(xlUp).Row
MsgBox lastrow - 1 & " Trials"
End With

With Worksheets("Calcs")
    For r = 0 To (lastrow - 2)
        .Range("CASHINPUT").Value = Worksheets("MCInput").Range("TCASHRTN").Offset(r).Value
        .Range("EQINPUT").Value = Worksheets("MCInput").Range("TEQRTN").Offset(r).Value
        .Range("FIINPUT").Value = Worksheets("MCInput").Range("TFIRTN").Offset(r).Value
        .Range("Results").Calculate
        .Range("Results").Copy
        Worksheets("Output").Range("A1").Offset(1 + r, 1).PasteSpecial xlPasteValues
    Next r
End With

Application.ScreenUpdating = True
Application.CutCopyMode = True

End Sub
 

Excel Facts

Excel Joke
Why can't spreadsheets drive cars? They crash too often!
In this forum I learned to use the arrays.
Im glad to help you. thanks for the feedback
 
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