Solution : https://service.sap.com/sap/support/notes/1232764 (SAP Service marketplace login required)
Key words : 
symptom performance issue, note 1231337 solution implement, attached correction instruction, /sapsrm/cl_pdo_dyn_mdf_it_qte reason, /sapsrm/cl_pdo_bo_qte, rfx response, program error, support package, prerequisites, prequisite
Related Notes : 
       
| 1331726 | Performance in items display in Rfx response | 
| 1255376 | Performance Issues in RFx and RFx Response | 
| 1255374 | Performance Issues in RFx and RFx Response | 
| 1254485 | Performance Issues in RFx and RFx Response | 
| 1236100 | Performance issues in RFx and Rfx response | 
| 1169088 | SRM 6.0 Performance Guide |