have you found a solution for this?
After moving to a new server, it has gotten really bad.
I am Using QlikView 11.2 SR 15 and Version 6.1.1 of SAP Connectors, as well as Version 13.1 of the Salesforce Connector.
I did some trial and Error, remvoing connectors from the C:\Program Files\Common Files\QlikTech\Custom Data directory. Salesforce does some minor slowdown, appearantly the folder QvSAPConnector is causing the trouble....
Regards from Germany,
If you for example remove/delete the QvSAPBAPIConnector.dll file from C:\Program Files\Common Files\QlikTech\Custom Data\QvSAPConnector the connector will diaspear from the list of available connectors in the script editor (and any existing script using this connector will fail). Removing the whole folder C:\Program Files\Common Files\QlikTech\Custom Data\QvBexConnector or C:\Program Files\Common Files\QlikTech\Custom Data\QvSAPSqlConnector will repectivly remove these two connectors. This could be an alternative if you only use a certian connector. However, I'm not sure how it will affect the load time of the script editor, you'll need to test that. If it doesen't improve the load time you could just reinstall the connectors and you are back to where you begun.