I have created InfoPath 2013 forms for submit data. I have created two list 1 is lookup list and another one is submit list. the functionality is when user login to the page it will capture some lookup data from lookup list based on who logged in to submit list.
Issue: when multiple user login to this site then getting performance issue, it's taking around 15 min time to open and retrieve data. when single user login to the site no issue.
So could you please confirm whether the issue with InfoPath form or the SharePoint site?