JavaScript In Meteor - how to do a bulk insert into a nested array meteor bulk insert,meteor mongodb bulk insert

I am trying to import several thousand records into a nested array in a collection in Meteor. This is financial data coming in a JSON object. I need to do some calculations on it before insertings it, so can't do that raw. Doing a $addToSet operation for every write is very, very slow. Is there a way to push the full set of data in one call?

My schema looks something like this.

NestedSchema = new SimpleSchema({
  item: {
    type: String
  },

   aThing: {
    type: Number
   }
});

MasterSchema = new SimpleSchema({
   symbol: {
     type: String,
     label: 'Symbol',
     unique: true
   },

   data: {
     type: [NestedSchema],
     optional: true
   }
});

I have a bunch of data like this that I want to insert.

var dataToInsert = [{item: "thing", aThing: 1}, {item: "thing2", aThing: 2}, {item: "thing3", aThing: 2}];

The data I'm trying to insert into the nested array is 5000+ records. I've looked at https://atmospherejs.com/udondan/bulk-collection-update and https://atmospherejs.com/mikowals/batch-insert but they don't seem to do exactly what I'm looking for. Ideally I would have a solution where I could append new records in bulk as I collect them.

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