MongoDB Insert Many, Update Many - node.js

Question

I'm using MongoDB in node.js. I'm trying to update or insert many documents based on different conditions; however, MongoDB update (with upsert) only works with a single document or many documents with the same condition. Currently, I have an array containing the objects that I want to insert (Or update if the unique index exists) and I'm looping through the array and calling the updateOnce; however, I believe this method is not very efficient for a large number of objects that I'm going to have.
What is a better way to achieve this?
var mongoUtil = require( './database.js' );
var db = mongoUtil.getDb();
//array of objects to insert:
//NOTE: First + Last name is a unique index
var users = [
{firstName:"John", lastName:"Doe", points:300},
{firstName:"Mickey", lastName:"Mouse", points:200}
];
var collection = db.collection( 'points' );
for(var i = 0; i < users.length; i++) {
//If firstName and lastName already exists, update points. Otherwise insert new object
collection.updateOne(
{firstName: users[i].firstName, lastName: users[i].lastName},
{$set: {points: users[i].points}},
{upsert: true},
function(err,docs) {
if(err)
console.log(err);
}
)
}

Answer 1

I solved this issue using .bulkWrite():
var mongoUtil = require( './database.js' );
var db = mongoUtil.getDb();
var collection = db.collection( 'points' );
var users = [
{firstName:"John", lastName:"Doe", points:300},
{firstName:"Mickey", lastName:"Mouse", points:200}
];
let userUpdate = users.map(user => ({
updateOne: {
filter: {firstName: user.firstName, lastName: user.lastName},
update: {$set: user},
upsert: true
}
}));
collection.bulkWrite(userUpdate).catch(e => {
console.log(e);
});