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copied!<p>It depends on how much you are actually updating on the screen as part of your code, (i.e. number of cells updated), and how many sheets are there, how many sheets/cells refer to sheet your code is updating and how many formulas are present in the whole workbook.</p> <p>Each time you change some thing in the sheet, Excel re-calculates all formulas. So if your code is not updating too many sheets/cells but your workbook has many formulas then turning off the screen update might not help you at all. </p> <p>One more thing to consider for perfomance is Calculation property, set this to xlCalculationManual to turnn off the auto recals and turn it back to xlCalculationAutomatic at the end.</p> <pre><code>Application.Calculation = xlCalculationManual </code></pre> <p>One more thing to conside is Events, if one or more of those sheets have Worksheet_Chnage or Worksheet_Calculate event handlers each change that your code is doing will trigger them and your code need to wait till they return. So turn it off during your code.</p> <pre><code>Application.EnableEvents = False </code></pre> <p>In most of my code, I susally use this</p> <pre><code>On Error GoTo lblError Dim bEvents As Boolean, iCalc As Integer, bScrnUpd As Boolean bEvents = Application.EnableEvents iCalc = Application.Calculation bScrnUpd = Application.ScreenUpdating Application.EnableEvents = False Application.Calculation = xlCalculationManual Application.ScreenUpdating = False '-----------------------My code Application.EnableEvents = bEvents Application.Calculation = iCalc Application.ScreenUpdating = bScrnUpd Exit Sub 'reset them even if you are exiting due to error lblError: Application.EnableEvents = bEvents Application.Calculation = iCalc Application.ScreenUpdating = bScrnUpd Debug.print Err.Description </code></pre>

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