Mongoose find() slow on large documents

This query never finishes:

   const stocks = await mongoose.model("stock").find().exec();
    console.log(stocks.length);

This query is executed in < 1 second

   const stocks = await mongoose.model("stock").find().select("ticker").exec();
    console.log(stocks.length);

I have a lot of data on each stock (10 years of stockdata).

What is mongoose doing? Some validation on each find? Some setting I can use to turn it off?

Or is the only option to use mongodb native?

Update:

Ok So I tried to do it mongo native instead:

console.log("start");
    const MongoClient = mongodb.MongoClient;
    await MongoClient.connect(connectionMongoUrl, (err, db) => {
      if (err != null) {
        console.log(err);
        return Promise.reject(err);
      }
      const dbo = db.db("tradestats");
      dbo
        .collection("stocks")
        .find({})
        .toArray(async function (err, stocks) {
          console.log(stocks.length); // never fires

Same problem! It never finishes. So it's not mongoose then. What can it be? Some memory settings in nodejs or something?

Update2:

Is it bad data model design? Wrong database? Should 10 years of stock prices be put in a separate collection and use reference instead?