InfoPath Dev

Hi, Thanks for extending your help on this I haven't worked with Indexes before I've got many columns and not sure how to approach this, would appreciate if you can point me in the right direction otherwise im worried ill end up with a new problem to deal with :)

Good day, I have a SharePoint 2013 list with over 16K list items. When the list was initially created, i had designed the form using Infopath 2013 and publishing the file was simple and fast (less than a minute) As the data got bigger, the "Quick publish" started taking more and more time. Today as i made minor modifications to the form ...