Solution : https://service.sap.com/sap/support/notes/519467 (SAP Service marketplace login required)
Key words :
symptom long runtimes occur, attached source code corrections, function module bup_but000_select_single occurs, function group bupa_select, database accesses occurs, sorted table type, contact partner relationships, partner functions, object customer_rel, initial download
Related Notes :
| 537486 | Composite SAP note:perfrmnce problms during initial download |