[PERFORMANCE] Merging of duplicates takes too long and sometimes leads to a Server Connection Lost

[markusmann-vg]

Feature Description

One of the use cases that health departments encounter often is the merging of duplicates. For this use case the performance is essential to be productive.

Problem Description

Even limiting the search in terms of time does not lead to any improvement.
After the health department has to merge several hundred duplicates, they need better performance of the system here.
The duration of merging duplicates takes in some cases 10 to 15 minutes and often even leads to a Server Connection Lost.

The Logs can be found here

Proposed Change

Possible Alternatives

Additional Information

[StefanKock]

Unclear: Is the merge view not loading does the save action not finish in reasonable time?

[MartinWahnschaffe]

Could be related to #8697 and will be analysed there.

[StefanKock]

Could be related to #8697 and will be analysed there.

Update: Will probably be improved by #9054.

[MartinWahnschaffe]

Also improved by #11465 and #11469