Vba screenupdating access
You may want to visit the IF() conditions and see if they are nested in the order in which they are most likely to be encountered.
Nested IF() conditions should be like: = IF ( most_likely_condition , IF(the_second_most_likely_condition , IF(the_third_most_likely_condition,….), ), ) Why, because the moment the first condition is met, the function will stop further evaluation and promptly return a value rather than having to go on checking if any of the other IF conditions are met.
Load workbook in memory when the workbook is first opened. Track all dependencies and build an initial “calculation chain”.
As a part of building this chain, it also tries to sequence all the calculations so that those cells which are the ‘least’ dependent on other cells are stacked at the beginning of the chain and the ones that are ‘most’ dependent are stacked towards the end of the chain. Calculate the cells that are marked in the chain one by one, starting from the top and proceeding along to the bottom of the chain.
Given that, also ensure that your own function is called last in a nested IF/OR condition.
Expectedly, it references a number of cells to generate an output.
If each cell that it references can be given a weight of one, the total weight of the formula would be the number of cells it references. It’s total weight would be the number of cells that are specified as the lookup range in the argument.
But in many other cases, especially when you have volatile functions in your complicated formula, by virtue of point 2 above, you may want to simplify things for Excel by breaking things down into smaller easily digestible pieces for it. Sometimes the VBA code can do the job much faster, on others it can slow thing down. Like any other language, reuse variables and define data and return types so that you don’t keep VBA from guessing an object’s type at run time.
That way, Excel may have to perform a much smaller number of calculations. Screen Updating = False at the beginning of your VBA code and end it with Application. It relieves Excel of it’s duty to update the screen till the time the code is getting executed. Additionally if you write your custom VBA functions (also called the UDF or User Defined Function), until unless you are a coding God, there is a strong chance that your function is going to consume more system resources than a comparable in built VBA function.
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So, wherever possible avoid using volatile functions in your spreadsheets and while writing VBA code, avoid the generous use of Application. Use references within the worksheet, then within various worksheets of the same workbook and only then to other workbooks.