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When a workbook is in manual calculation mode, the workbook will not recalculate until you explicitly trigger a calculation.
The idea is to place Excel into manual calculation mode, run your code, and then switch back to automatic calculation mode.
Setting the calculation mode back to xl Calculation Automatic will automatically trigger a recalculation of the worksheet. Calculation = xl Calculation Manual You may notice that when your macros run, your screen does a fair amount of flickering.
This flickering is Excel trying to redraw the screen in order to show the current state the worksheet is in.
The grater the amount of screen changes the bigger the impact will be. Other application settings that can make a difference to execution time are Calculation and Event handling. Enable Events = False ' Code here Clean Up: On Error Resume Next Application. Calculation = xl Calculation Automatic Application. Enable Events = True Exit Sub EH: ' Do error handling Go To Clean Up End Sub Sub test Screen Updating() Dim i As Integer Dim numb Switches As Integer Dim results As String 'swap between sheets this number of times numb Switches = 1000 'keep track of time Dim start Time As Double start Time = Time 'swap between sheets 1/2 (need both sheets or this will crash) For i = 1 To numb Switches Sheets(1 (i Mod 2)).
Use this code template as a starting point (the error handler ensures that these properties are turned back on at the end of the sub, even if it errors) Sub Your Sub() On Error Go To EH Application. Select Next i 'get results results = "Screen Updating not disabled: " & Format(Time - start Time, "hh:mm:ss") & " seconds" start Time = Time 'scenario 2 - screenupdating disabled Application.
If your workbook is formula intensive, you may not want Excel to trigger a recalculation every time a cell value is altered by your macro. Calculation property to tell Excel to switch to manual calculation mode.To demonstrate the principle of this technique we'll need a small example procedure that makes lots of visible changes to the Excel workbook.You can either download the example here, or create a new blank workbook, add around five worksheets to it and then copy the code shown below into a new module.One quick and easy technique to make your code run faster in Excel VBA is to simply prevent the screen from being redrawn each time something changes.