Purchase Requistion Screen hangs because of WorkFlow

Hi All,

When i try to create Purchase Requistion (with work Flow enabled.) with almost 250 items then the Screen hangs during the process of Work Flow . The Work Flow some how is reading all the 250 items to give the yellow status bar at the top of the screen is taking more than 3 minutes . Did any one see the same problem with many items in Purchase Requisition. Do we have any performance areas with WorkFlow ?