Does having extra, unused columns slow my spreadsheet down

[dpaton05]

I have a table that goes up to column Q of the visible columns and there are hidden columns of R to AP. There are 14 columns between R and AP that are unused. I started using them then later found that I did not need them and because I have hard coded the reference into my code to the columns, I have just left the columns blank. Will it slow down my spreadsheet having all the additional blank columns in the middle of the columns that my spreadsheet interacts with?

 

[mamady]

It will not. Conditional Formatting and nested formulas are the ones which impact the processing performance