Similar problem here. I am having a fresh installation of Qlik Sense Enterprise Jun 2017 release for upgrade review. I did a side by side comparison with the releases Jun 2017 and 3.2 SR4, focusing on "Add Data" operation after read Gianluca's post. The two QS server are installed on separated machine with the same hardware resources. The following list some findings:
For initializing the Add date page
1a) Jun 2017 - 20+ sec
1b) 3.2 SR4 - show instantly
For initializing the MS SQL Server connection creation page (sample check)
2a) Jun 2017 - 20+ sec
2b) 3.2 SR4 - show instantly
For initializing the select data to load/add data page
3a) Jun 2017 - 20+ sec, sometimes the process is terminated and is needed to re-click the Create button for re-try
3b) 3.2 SR4 - show instantly
I tried to monitor Windows Task Manager during the above operations and the resources (CPU/Memory) maintain at a low level.
After configured the QS server to connect to the Internet, the Add Data page looping issue was gone.
The QS Server did not have Internet Connection and there was an alert of "No Internet connection detected. You must be connected to the Internet to use DataMarket".
Not sure if the problem of connecting to Qlik DataMarket caused the issue.
To resolve the problem:
First: Stop all QS services on all nodes
Then: Edit C:\Windows\Microsoft.NET\Framework64\v4.0.30319\config\machine.config
After: Change (or add) the <runtime/> tag to reflect:
To finish: Start all the services & test
it work fine for me !