Solution : https://service.sap.com/sap/support/notes/1376816 (SAP Service marketplace login required)
Key words : 
prerequisites performance optimization solution import, optimize po 'save' operation, attached advance correction manually, records management integration calls, terms records managent, functional defects, update task, /sappssrm/cl_bbp_action_base, /sappssrm/rm_add_snapshot, bbp_output_po_preview_smart reason
Related Notes : 
       
| 1266771 | SRM 7.0 Performance Guide |