Apply multiprocessing to Add pics to sets. For 50K pics takes a long time

[oPromessa]

Either:

• create/add to set while loading (attention to multiprocessing conflicts)
• or apply multiprocessing while assigning pics to sets (again attention to multiprocessing conflicts)
  • possibly create the Sets in one go with primary key
  • followup with assignment of pics to sets in multiprocessing mode...
    • maybe splitting pics to have chunks per grouped sets for each process (except if one set has 1000's of pics...)