const MyComponent = ({ myprops }) => {
  const refCount = React.useRef(0);

  refCount.current++;

  return (
    <p>
      {myprops}, Ref Count: {refCount.current}
    </p>
  );
};

const MemorizeMyComponent = React.memo(MyComponent);

const App = () => {
  const [state, setState] = React.useState("");
  
  const handleSetState = e => {
    setState(e.target.value)
  }
  
  return (
    <div className="App">
      <input type="text" value={state} onChange={handleSetState}/>
      <MyComponent myprops="MyComponent" />
      <MemorizeMyComponent myprops="MemorizeMyComponent" />
    </div>
  );
};

ReactDOM.render(<App />, document.getElementById("root"));