是否在MongoDB中使用async/await时应用游标方法之前获取文档总数？

const MongoClient = require('mongodb').MongoClient;

async function getDocuments() {
  const url = 'mongodb://localhost:27017';
  const dbName = 'mydb';

  const client = new MongoClient(url, { useUnifiedTopology: true });

  try {
    await client.connect();

    const db = client.db(dbName);
    const collection = db.collection('mycollection');

    // 使用游标方法进行文档查询
    const cursor = collection.find({});

    // 遍历游标并处理每个文档
    await cursor.forEach(async function(doc) {
      // 处理文档
      console.log(doc);
    });
  } finally {
    // 关闭数据库连接
    await client.close();
  }
}

getDocuments();