Solution : https://service.sap.com/sap/support/notes/1346046 (SAP Service marketplace login required)
Key words : 
activate business functions, support package sapkb70009, correcting performance problems, encounter performance problems, higher basis release, terms enhancement framework, switch framework reason, performance problems, basis release 7, enhancement framework
Related Notes : 
       
| 1420290 | Performance when importing EHP/SP for enhancements | 
| 1369430 | |
| 1360490 | |
| 1279597 | |
| 1241581 | |
| 1225485 | |
| 1175471 | |
| 1138351 | Long runtime of background job SAPRUPGM | 
| 1062743 | |
| 1062559 | XPRA_UPG phase hangs due to database table DWTREE |