Access a Table owned by different user as View - Performance

Dear Experts,

Question 1:

      We had a scenario as accessing a Table from Different user. Due to security we allow user to access from different users instead of users access the tables directly we have created a View and users are using these views from SAP BO and it seems to be having some performance problem.

      TableA owned by OwnerA

       OwnerB is configured with SAP BO. So we have created ViewB(Create or Replace view select * from owerA.TableA;) for the TableA owned by OwnerA in OwnerB. There is no conditions actually ownerB access the entire table using the view.

      I would like to know if any performance issue can be happened because of this.