there is a function that often needs to query data according to the factory id. Which of the following designs is more reasonable?
or is the efficiency the same?

scenario 1:
{

     {
        "_id" : 1, 
        "product" : "1", 
        "price" : 5.5, 
        "quantity" : NumberInt(5), 
        "factory":"1"        
    },
    {
        "_id" : 2, 
        "product" : "2", 
        "price" : 5.5, 
        "quantity" : NumberInt(5), 
        "factory":"1"        
    },
    .....
    .....

}

scenario 2:
{

  "factory":"1",
  "list":[
     {
        "_id" : 1, 
        "product" : "1", 
        "price" : 5.5, 
        "quantity" : NumberInt(5),        
    },
    {
        "_id" : 2, 
        "product" : "2", 
        "price" : 5.5, 
        "quantity" : NumberInt(5),        
    },

    ....
    ....

  ]

}