Expert advice needed: Will a simple UDF massively slow down the calculation?

[billj]

Dear all,

For my simple formula, I can use either normal Excel formulas or a custom function UDF.

The excel formula is:

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So now I can simply type: =ZScore(A1,"MCap") which return the same result as that from the Excel formula.

My question is: if I apply this UDF to 5000 rows and 50 columns, will the calculation be massively slowed down?

Many thanks for your expert advice.

[TMS]

I would expect inbuilt functions to be quicker than a UDF.

Best way would be to try it on a copy of the workbook and see what the impact is.

[billj]

Thanks, TMS. It is very true. I did a test and found UDF is much slower than inbuilt function.

[TMS]

You're welcome. Thanks for the rep.



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