FILTER function causing slow refresh?

StuLux

Well-known Member
Joined
Sep 14, 2005
Messages
643
Office Version
  1. 365
Platform
  1. Windows
I have a large Excel workbook that I created for a client some time ago to manage conferences. As part of the automation I have code that creates worksheets for each customer (up to 40 customers) and on each tab there are sections to show which delegates that customer will be meeting and at what time etc.

My existing workbook works OK but I thought I might be able to take advantage of the new FILTER function to improve it. In particular I have VBA code that currently filters the master list of delegates (using several criteria) and then copies details to the individual customer tabs.

Instead of using VBA I figured I could simply use the FILTER function on each tab and thereby each tab would always be up to date (whereas at present the user has to run VBA code to refresh all tabs).
However, after doing this, I have found that Excel has slowed down so much to become unusable and I am presuming this is because the recalculation of all the FILTERs is taking a very long time.
Could anybody confirm that my presumption is correct and possibly have any suggestions as to how it might be improved. There could be up to 280 FILTERs across 40 tabs.
 

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