Solution : https://service.sap.com/sap/support/notes/1169088 (SAP Service marketplace login required)
Key words : 
important performance related notes, symptom performance guide srm 6, pay special attention, performance issues origin, outdated database statistics, performance issues, terms performance, guide attached, database section, browser settings
Related Notes : 
       
| 1331726 | Performance in items display in Rfx response | 
| 1255381 | New pop-up for upload of excel sheet into 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 | 
| 1252391 | Providing background jobs for critical actions in Quote | 
| 1241712 | Performance issue with POWL refresh of RFx query for bidders | 
| 1241238 | Performance issue with Refresh of POWL query for Quotation | 
| 1236753 | Performance issue with Partner DO | 
| 1236100 | Performance issues in RFx and Rfx response | 
| 1235230 | Performance issues during Bid upload and download to excel | 
| 1234667 | Long runtime when uploading Excel file | 
| 1234631 | Performance in items display in Rfx and Quote | 
| 1234496 | Long runtime when renewing contract using bid | 
| 1232764 | Performance issue in RFx Response (Quote) | 
| 1232732 | Performance issue in RFx Response (Quote) | 
| 1231337 | Performance issues with RFx and RFx Response | 
| 1231017 | Performance improvements in conditions | 
| 1230834 | Runtime loss when reading many items | 
| 1230711 | Performance contract: Conditions and change documents | 
| 1230120 | Performance improvement in contract document | 
| 1230118 | Performance improvement in contract distribution check | 
| 1228886 | Runtime loss when saving a bid invitation | 
| 1227744 | Performance issue in conditions | 
| 1227042 | Performance improvement in contract for document check | 
| 1225933 | Performance contract: Release in the background | 
| 1224661 | Performance improvement during check on Conditions | 
| 1223168 | Performance improvement in contract:Condition,BADI, distribu | 
| 1180983 | Performance contract: Conditions and change documents | 
| 1180217 | Performance: Long runtimes when checking conditions | 
| 1179790 | Performance: Too many checks when item is correct | 
| 1179550 | Performance improvement in Contract with large No. of items | 
| 1179486 | Performance issue in Conditions | 
| 1172022 | Performance issue in Conditions | 
| 1151288 | Program terminates when creating contract from quotation | 
| 1134597 | Avoid bypassing buffer while checking for EVL relevance | 
| 1126885 | Memory tuning in the context (CL_ABAP_STRUCTDESCR) | 
| 1114456 | WD ABAP ALV Performance improvements | 
| 1101954 | Memory consumption with respect to T688C | 
| 1100926 | FAQ: Network performance | 
| 1081030 | WD ABAP ALV enhancements for improving performance | 
| 1065858 | Performance: Avoid HTTP 304 response with IE Browser setting | 
| 1061240 | Slow web browser due to JavaScript virus scan | 
| 948066 | Performance Analysis: Transactions to use | 
| 880749 | Patching of VMC based AP 7.00 engines | 
| 856803 | Improved performance in list displays | 
| 819641 | FAQ: SAP MaxDB Performance | 
| 799428 | Downloading SAProuter and/or niping | 
| 618868 | FAQ: Oracle performance | 
| 539720 | Simplified pricing (classic scenario) | 
| 500235 | Network Diagnosis with NIPING |