Whether you are a professional developer or an end user, optimizing your VBA macro performance is a critical step to a smoother workflow. Fortunately, how excel can help exapts are many tactics that you can employ to significantly improve macro performance. From disabling animations to leveraging built-in functions, these proven strategies offer a roadmap for amplifying macro speed and efficiency.
Use constants whenever possible. This practice ensures that variables are evaluated only once at compile time, rather than each time they’re used at runtime. It also makes code easier to understand, because you don’t have to keep track of variable values. For more, see Using Constants (Properly) In VBA.
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When possible, minimize traffic between VBA and Excel. Specifically, avoid repeatedly grabbing data from the worksheet. Instead, read large blocks of data into an array at the beginning and loop through it, or write your data back to the worksheet in a single chunk at the end.
Disable screen updating and automatic calculations in all of your large procedures. This will greatly improve processing speed by preventing Excel from updating the worksheet image during the execution of your code. Be sure to restore this setting at the end of your macro.
Eliminate unnecessary if/else statements and re-write loops to utilize a For Each or For Each-Other construct. This will reduce the number of iterations and thereby increase macro runtime.
