The view has only been slightly customized. See .php reference below. I have tested up and down for plugin conflicts, tables have been optimized, I’ve run down the typical troubleshooting tasks, but to no avail, my EE4 Table View takes forever to load. The only other variable I can think of is my CSS, my CSS alterations are in place via my Theme.
I checked and the page loads quickly for me. The page does include a significant number of scripts and stylesheets that don’t appear to be used on the page. So if you’re familiar with conditionally remove unneeded scripts and stylesheets, you could do that to speed up the page load time. Here’s a guide that explains how to conditionally remove scripts/stylesheets: