如何在react native中获取fetch的响应时间？

import React, { useState } from 'react';
import { View, Text, Button } from 'react-native';

const App = () => {
  const [responseTime, setResponseTime] = useState('');

  const fetchData = () => {
    const startTime = new Date().getTime();

    fetch('https://api.example.com/data')
      .then(response => {
        const endTime = new Date().getTime();
        const serverResponseTime = response.headers.get('x-response-time');
        const totalResponseTime = endTime - startTime;

        setResponseTime(`Server Response Time: ${serverResponseTime}ms\nTotal Response Time: ${totalResponseTime}ms`);
      })
      .catch(error => {
        console.error(error);
      });
  };

  return (
    <View>
      <Button title="Fetch Data" onPress={fetchData} />
      <Text>{responseTime}</Text>
    </View>
  );
};

export default App;