Solution : https://service.sap.com/sap/support/notes/836256 (SAP Service marketplace login required)
Key words : 
performance analysis tools runtime analysis, executing cad desktop functions directly, sap note 925800 sap note 925911 sap note 928926, database server general network problems, customer-specific additional function, badi method cdesk_badi_main~workdir_folder_structure, customizing parameter cdesk_workdir_folder = 'x', set integration-specific parameters, relevant cad integration partner, duplicate document structure items
Related Notes : 
       
| 971688 | CDESK: Buffer mechanism in CAD desktop | 
| 971687 | CDESK: Progress indicator (Create/check-in/delete DIS) | 
| 968000 | CDESK: Display/update of classification data | 
| 948720 | CDESK: Performance of current directory w/ dir structure | 
| 940466 | CDESK: No check-out assistant if no conflict or error | 
| 928926 | CDESK: RFC function modules for CAD desktop | 
| 927694 | CDESK: Performance of the CDESK_UPDATE_FILE_INFO callback | 
| 925911 | CDESK: Solving version conflicts in check-out assistant | 
| 925800 | CDESK: Display options for displaying the CAD/SAP view | 
| 875984 | CDESK: Unnecessary refresh of grid views in CAD desktop | 
| 873142 | CDESK:CDESK_NO_REFRESH_DOC parameter when creating documents | 
| 870583 | CDESK: Reselecting generics/variants | 
| 849404 | CDESK: Performance of "Expand Subtree" in the SAP view | 
| 820565 | CDESK + Solid Works: Summarizing duplicate items | 
| 820322 | CDESK: Global query after BAdI implementation | 
| 807963 | CDESK: SolidWorks New derivation of document structures | 
| 803093 | CDESK: Performance improvement when filling the CAD view | 
| 770330 | CDESK: Suppress refresh of the views for modification | 
| 698213 | CDESK: Performance for callback CDESK_UPDATE_FILE_INFO | 
| 627580 | CDESK: FAQs for the CAD desktop 2.x | 
| 602895 | CDESK: Performance of the reselection for parts families | 
| 500235 | Network Diagnosis with NIPING | 
| 164203 | Problems with SAPHTTP | 
| 93042 | Problems with SAPFTP | 
| 83020 | What is consulting - What is support? |