Requirements Chrome Setup Make sure you have a course with lots of enrolled users. You can you the Make test course and create a M sized course. Testing Log in as admin and go to the participants page of the course. Open developer tools in your browser, switch to Performance tab and change to Slow 3G in Network field. Change the table page. Make sure the loading icon is visible while the request is being processed and it disappear once it finishes. Try other filters, like first name and surname and make sure it works as expected.