node.js - 使用 async wait 后代码非常慢？

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这里使用 async wait ，但是当我向此发送请求时，它需要更多时间来发布数据，它变得非常慢？

user.user_type = 'admin';
  user.hotelCode = hotelCode;
  user.lastName = ''
  user.setPassword(req.body.password);
  const _id = hotelCode;
  const hotelObj = { _id, email, created_by, country, state, city };
  const hotelDb = new Hotel(hotelObj);
  await hotelDb.save();
  const saveUser = await user.save();
  let token = saveUser.generateJwt();
  const tokenDb = new tokenSchema({ _userId: saveUser._id, hotelCode:hotelCode, token: crypto.randomBytes(16).toString('hex') });
  const tokenSave = await tokenDb.save();
  await User.update({ email: user.email }, { $set: { token: tokenDb.token } }, { strict: false });
  const mailOptions = {
    from: 'xxxx@gmail.com',
    to: saveUser.email,
    subject: 'Account Verification Token',
    html: '<p>Hello,</br>\n\n' + 'Please verify your account by clicking the link: \nhttp:\/\/'
      + req.headers.host + '\/api/account/verify\/' + '?token=' +
      tokenSave.token + '&email=' + saveUser.email + '\n </p>'
  };
  await transporter.sendMail(mailOptions);
  let restaurant = new Restaurant({ userId: saveUser._id, hotelCode: hotelCode, name: req.body.name.split(/[\s,]+/)[0] + "'s Restaurant" });
  await restaurant.save();
  res.status(200).json({
    "token": token,
    "user": user
  });

Answer 1

最后两个网络调用是独立的，因此您可以使用promise.all来调用它们，以便调用并行进行，

let restaurant = new Restaurant({ userId: saveUser._id, hotelCode: hotelCode, name: req.body.name.split(/[\s,]+/)[0] + "'s Restaurant" });
await Promise.all[transporter.sendMail(mailOptions), restaurant.save()]