Slow Performance (app.PowerBi.com)

Thank you for your reply Anonymous.  We are in the SouthEastern Region of the US.  Our datasets themselves have not changed.  We do have users modifying reports and creating dashboards against the datasets we pubish to the business.  It is not just that the reports are slow, simple operations such as changing a slicer value or placing the cursor in a filter box are slow to respond.  So is moving from dashboard to report or from report to report.  We have added a handful of new users to our workgroup but they are only consumers of data and mostly just subscribe to reports.  Any insight you may have or tips for trouble shooting the issue is greatly apprecaited.