BC runtime fields (Sales ($) and Sales Qty) slows down page loads

BC runtime fields (Sales ($) and Sales Qty) slows down page loads when we made them available to Item List view, is there any ways to improve this?

Anyone has experience making similar changes in BC? Such as Prior Year GP/Sales and YTD GP/Sales fields.

This is exactly why showing flowfields on a List page is generally not recommended. Do you need to see these values for all records at once? If not, consider placing these fields in a FactBox to display only for the current record.

Another option might be a Page Background Task.

Remove or hide them. Or move them to a factbox as suggested by Brian.