While I’m thinking about this stuff, I’d like to share a few simple tips for speeding up your Excel VBA code. So feel free to comment and share any other performance tips you may have.
Each time a cell that affects any formula in your spreadsheet is changed or manipulated, Excel recalculates the entire worksheet.
Not only did I see a huge variety in how Excel is being used, you also pointed out various tips and tricks for writing fast VBA code in Excel.In this post I’m going to share with you the most important performance tips I know about.When executing a macro, you can sit back and watch all the onscreen action that occurs in the macro.Although doing this can be instructive, after you get the macro working properly, it’s often annoying and can slow the performance of your macro considerably.Note that in the code sample below we grab the current state of these properties, turn them off, and then restore them at the end of code execution. Display Page Breaks = False ‘note this is a sheet-level setting ‘: This setting tells Excel to not redraw the screen while False.
One reason this helps is that if you’re updating (via VBA) several different ranges with new values, or copy / pasting from several ranges to create a consolidated table of data, you likely do not want to have Excel taking time and resources to recalculate formulas, display paste progress, or even redraw the grid, especially after every single operation (even more so if your code uses loops). The benefit here is that you probably don’t need Excel using up resources trying to draw the screen since it’s changing faster than the user can perceive.I want to start off this post by thanking everyone who sent in their examples in response to my January request.It is incredibly helpful to be able to look at what you all are doing with Excel!Fortunately, you can disable the screen updating that normally occurs when you execute a macro.To turn off screen updating, use the following statement: The range is filled much faster, and you don’t see the result until the macro is finished running and screen updating is (automatically) set to True.There are tons of sites, pages, and people who are experts as well on this subject, have performed their own tests, and shared their results and ideas.