sERIOUS question: Is there a method for testing a site that defines how much JS heavy FEs are? --- I have noticed a significant issue with speed on sites afte

sERIOUS question: Is there a method for testing a site that defines how much JS heavy FEs are? --- I have noticed a significant issue with speed on sites after upgrading my main machines, but dont know how to judge if its local or remote. I have a flagshit HP gaming machine, with the best laptop nvidia card on the market.... windows 11 (with a sister machine of same specs with linux) Ryzen 5K RTX 3070 blah blah... But the load times on these "gaming centric" machines are way slower than older, les spec'd machines... I cant tell where my bottle-neck is. How test this specific, in your opinion?