Speed up uplifting. Currently it it quite slow, several seconds per entry....
Identify bottlenecks. To make clear what that means:
We have several million records 3+ Mio. If uplifting takes one second per record. uplifting all the data will take 35 days. This can and should be parallelized. Currently uplifting take several seconds per records. i.e it would take half a year to uplift the data we have.