Poor performance by opening report details and grouping tests

[filipwoz]

I observed a very poor performance in displaying the sub-tests on the second level of hierarchy in KLOV: It takes several minutes to load these tests in the details area on the right and makes the application unresponsive. On the other hand loading of the top level tests on the left is very quick :-) .

Further I tried the same without the hierarchy and also opening a single detail report takes several minutes.

Proposed solution: I assume by loading the sub-tests into the details area is loading all the details of the reports, which I find is not needed:

• only the headers of these tests could be loaded first and the details first when the user expands them
• All the sub-tests can be collapsed initially
• It is not needed to lead the thumbnails of the screenshots - they are anyway hardly readable and I assume they cost lots of performance
• Only a content fitting on the screen could be loaded into details and "Load more" button could be added - similarly like for the top level tests on the left

[filipwoz]

I have found the root cause of the issue in the sub-optimal configuration of the MongoDB Server. MongoDB was installed as Linux Docker Image on a Windows machine. Now I installed the newest Community edition MongoDB (with setup - no docker) on a separate Windows Server and the performance is acceptable again.