Currently I store the relationship id by just passing the related model id, for example:

{ 
   "_id": ObjectId("5ff7fcf93e2c5a4462b1e619"), 
   "text": "This is a comment.", 
   "userId": "5ff7fbc93e2c5a4462b1e612"
} 

However, in some examples or tutorials on the internet I see the relationship like this:

{ 
   "_id": ObjectId("5ff7fcf93e2c5a4462b1e619"), 
   "text": "This is a comment.", 
   "userId": ObjectId("5ff7fbc93e2c5a4462b1e612") 
}

Putting the relationship inside ObjectId("5ff7fbc93e2c5a4462b1e612") or simply the direct id 5ff7fbc93e2c5a4462b1e612 , does it make any difference to query performance?

I am not aware of methods to do this test. I would like to know the opinion of those who work with mongodb. One observation is that I’m using mongodb in laravel.