i have a 2 Fields that I use as global filter on 90 sheets, i also place these fields on color, and detail shelf for tooltips, i currently dragged the global filter on color and detail shelf (on all 90 sheets)....
will performance improve if i use the local field name (from primary data source) vs using global field name (from secondary data source)
I don't know the details of your data-source .
You can probably try performance recording and see yourself which one is better.
I guess Global filter should make more sense , but you never know