Solution : https://service.sap.com/sap/support/notes/1138533 (SAP Service marketplace login required)
Key words :
large tu reason, large transportation units, terms /scwm/tu, prerequisites performance improvement, handling units, /scwm/load, /scwm/cl_goods_movement, symptom runtime, loading process, line items
Related Notes :
1151892 | Asynchronous goods receipt posting with external lock |
1136862 | PERF: Context information as a prerequisite |