excel-vba Excel-VBA Optimization Disabling All Excel Functionality Before executing large macros


The procedures bellow will temporarily disable all Excel features at WorkBook and WorkSheet level

  • FastWB() is a toggle that accepts On or Off flags

  • FastWS() accepts an Optional WorkSheet object, or none

  • If the ws parameter is missing it will turn all features on and off for all WorkSheets in the collection

    • A custom type can be used to capture all settings before turning them off
    • At the end of the process, the initial settings can be restored

Public Sub FastWB(Optional ByVal opt As Boolean = True)
    With Application
        .Calculation = IIf(opt, xlCalculationManual, xlCalculationAutomatic)
        If .DisplayAlerts <> Not opt Then .DisplayAlerts = Not opt
        If .DisplayStatusBar <> Not opt Then .DisplayStatusBar = Not opt
        If .EnableAnimations <> Not opt Then .EnableAnimations = Not opt
        If .EnableEvents <> Not opt Then .EnableEvents = Not opt
        If .ScreenUpdating <> Not opt Then .ScreenUpdating = Not opt
    End With
    FastWS , opt
End Sub

Public Sub FastWS(Optional ByVal ws As Worksheet, Optional ByVal opt As Boolean = True)
    If ws Is Nothing Then
        For Each ws In Application.ThisWorkbook.Sheets
            OptimiseWS ws, opt
        OptimiseWS ws, opt
    End If
End Sub
Private Sub OptimiseWS(ByVal ws As Worksheet, ByVal opt As Boolean)
    With ws
        .DisplayPageBreaks = False
        .EnableCalculation = Not opt
        .EnableFormatConditionsCalculation = Not opt
        .EnablePivotTable = Not opt
    End With
End Sub

Restore all Excel settings to default

Public Sub XlResetSettings()    'default Excel settings
    With Application
        .Calculation = xlCalculationAutomatic
        .DisplayAlerts = True
        .DisplayStatusBar = True
        .EnableAnimations = False
        .EnableEvents = True
        .ScreenUpdating = True
        Dim sh As Worksheet
        For Each sh In Application.ThisWorkbook.Sheets
            With sh
                .DisplayPageBreaks = False
                .EnableCalculation = True
                .EnableFormatConditionsCalculation = True
                .EnablePivotTable = True
            End With
    End With
End Sub