[From the Profiler docs](https://reactjs.org/docs/profiler.html#onrender-callback):

> The Profiler requires an onRender function as a prop. React calls this function any time a component within the profiled tree “commits” an update.

However, given:

```jsx
import React from 'react'
import ReactDOM from 'react-dom'

function Counter() {
  const [count, setCount] = React.useState(0)
  const increment = () => setCount(c => c + 1)
  return <button onClick={increment}>{count}</button>
}

function App() {
  return (
    <div>
      <React.Profiler
        id="counter"
        onRender={() => console.log('called')}
      >
        <div>
          Profiled counter
          <Counter />
        </div>
      </React.Profiler>
      <div>
        Unprofiled counter
        <Counter />
      </div>
    </div>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))
```

I'm getting a log when I click on the unprofiled counter.

Reproduction: https://codesandbox.io/s/react-codesandbox-tnff6

Am I misunderstanding this API, or is this a bug?
state = {renderTime: 1};
            render() {
              first = this;
              Scheduler.unstable_advanceTime(this.state.renderTime);
              Scheduler.unstable_yieldValue(
                'FirstComponent:' + this.state.renderTime,
              );
              return <Yield renderTime={4} />;
            }
          }
          let second;
          class SecondComponent extends React.Component {
            state = {renderTime: 2};
            render() {
              second = this;
              Scheduler.unstable_advanceTime(this.state.renderTime);
              Scheduler.unstable_yieldValue(
                'SecondComponent:' + this.state.renderTime,
              );
              return <Yield renderTime={7} />;
            }
          }
          Scheduler.unstable_advanceTime(5); 
          const renderer = ReactTestRenderer.create(
            <React.Profiler id="test" onRender={callback}>
              <FirstComponent />
              <SecondComponent />
            </React.Profiler>,
            {unstable_isConcurrent: true},
          );