React-profiler

sublime-medium.txt

const App = () => {
  const loadData = id => ({ id, value: 'some' })
  const [_, setDummy] = useState()

  return (
    <div className="App">
      <button onClick={() => setDummy(Date.now())} />
      <SlowComponent
        onClick={React.useCallback(() => loadData('dummy'), [])}
      />
    </div>
  )
}