Solution : https://service.sap.com/sap/support/notes/139006 (SAP Service marketplace login required)
Key words : 
additional key words cs02, material takes long, low-level code, symptom including, class item, advance correction, recursiveness check, recursiveness, assignment, performance
Related Notes : 
       
| 370860 | CS02: Long runtime for check on class recursiveness | 
| 167523 | Missing recursiveness check for class item | 
| 84153 | Class item: low-level code of components incorrect |