There is a long delay between clicking on the "Test" button on the Process Design screen and the appearance of the window to select the server on which to run the test. The delay can be anything from 20 seconds to 60 seconds based on user feedback.
Checking using developer tools in Chrome to inspect the call that "check_conflict" is pending for a long time (50 seconds in the attached screenshot)
The call seems to be a call to the API http://<nac_host>/datamanagement/design/components/5131/executables/6166234/check_conflict
Restarting Chrome did not help improve any performance so this seems to be a server side performance issue, is there scope to improve the performance of this API and feature?