C# - Efficient way to iterate a List and create objects

Question

I have four classes. Apple, Orange, Mango and FruitIdentifier. First 3 classes have same properties ID and Price. I have a list of objects ( contains apple, orange and mango). I am iterating the list and based on the item type, creating FruitIdentifier instances and adding to a new list.

 public class Apple
    {
        public int ID { get; set; }
        public double Price { get; set; }
    }


    public class Orange
    {
       // props same as apple
    }

    public class Mango
    {
        // props same as apple
    }

    public class FruitIdentifier
    {
        public int ID { get; set; }
        public double Price { get; set; }
        public string Name { get; set; }

        public FruitIdentifier (int id, double price, string name)
        {
            ID = id;
            Price = price;
            Name = name;

        }
    }

I am expecting a long list. My doubt is, before creating FruitIdentifier objects, I assign ID and Price properties to two variables and then passing those variables to FruitIdentifier constructor. Is there any performance improvement if I give the values directly inside the Constructor call.

List<object> fruitList = new List<object> (); // going to contains 1000s of items

            List<FruitIdentifier> fruisIdentifiers = new List<FruitIdentifier> ();

            foreach (var fruit in fruitList)
            {
                if (fruit is Apple apple)
                {
                    apple.Price += 10;

                    var id = apple.ID;
                    var price = apple.Price;

                    fruisIdentifiers.Add(new FruitIdentifier (id, price, "Apple"));
                }

                if (fruit is Orange orange)
                {

                }

                if (fruit is Mango mango)
                {

                }

            }

// fruisIdentifiers.Add(new FruitIdentifier (apple.ID, apple.Price, "Apple"));

// like this. Any perfromance improvement ? 

Answer 1

If you're looking for a performance improvement between:

var id = apple.ID;
var price = apple.Price;

fruisIdentifiers.Add(new FruitIdentifier (id, price, "Apple"));

and

fruisIdentifiers.Add(new FruitIdentifier (apple.ID, apple.Price, "Apple"));

It will be so negligable as to be non-existant. Don't prematurely optimize, and when you find your program is not performing, go looking for the real issues.