Disable Auto Refresh
New to release 0.8.2 is a feature to help with heavy Power Pivot users in Excel 2013. After every minor change in Power Pivot, all PivotTables refresh. This can be a huge time waster if you intend to make several Power Pivot model changes in a row. To avoid this delay after each Power Pivot change, right click on a PivotTable connected to Power Pivot (the built-in Excel Data Model) and choose Disable Auto Refresh:Then make your batch of changes in Power Pivot. When you are done, right click the PivotTable again and choose Enable Auto Refresh: