Clicking feedback is very bad, sometimes it's instantaneous, other times it takes a couple of seconds that makes me unsure whether I actually clicked. Product p

Clicking feedback is very bad, sometimes it's instantaneous, other times it takes a couple of seconds that makes me unsure whether I actually clicked. Product pages loads fast but any other page is a lottery if it's going to load fast or take 2 seconds. Maybe this is a Commerce.js issue. Is there a way to test the administration pages?