Nodejs express promise.all().then()不是同步的

const express = require('express');
const app = express();

app.get('/', async (req, res) => {
  try {
    const result = await Promise.all([promise1(), promise2(), promise3()]);
    res.send(result);
  } catch (error) {
    res.status(500).send(error.message);
  }
});

function promise1() {
  return new Promise((resolve, reject) => {
    // 异步操作
    setTimeout(() => {
      resolve('Promise 1 resolved');
    }, 1000);
  });
}

function promise2() {
  return new Promise((resolve, reject) => {
    // 异步操作
    setTimeout(() => {
      resolve('Promise 2 resolved');
    }, 2000);
  });
}

function promise3() {
  return new Promise((resolve, reject) => {
    // 异步操作
    setTimeout(() => {
      resolve('Promise 3 resolved');
    }, 3000);
  });
}

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});