Open met de inspector tools van je browser de console tab en plak de onderstaande code.
try { // Create the performance observer. const po = new PerformanceObserver((list) => { for (const entry of list.getEntries()) { // Log the entry and all associated details. console.table(entry.toJSON()); } }); // Start listening for `longtask` entries to be dispatched. po.observe({type: 'longtask', buffered: true}); } catch (e) { console.log(`The browser doesn't support this API`) }