When adding a significant number of elements to the end of a LinkedList, does its performance decrease compared to other data structures?

In Java, the LinkedList class is implemented as a doubly linked list, and adding an element to the end of the list is usually performed in constant time O(1), since LinkedList has a reference to the last element (tail). This means that performance when adding to the end should not degrade as the number of elements grows.

However, if you use methods that require traversing the list (for example, adding at an index that is not at the end), performance will be worse, as finding the required position takes O(n).

Compared to other data structures, such as ArrayList, adding to the end of an ArrayList is also on average O(1), but when the array reaches its capacity, it is resized, which temporarily reduces performance.

In summary:

• Adding to the end of LinkedList is usually fast and stable.
• If you notice performance degradation, it might be due to inefficient addition methods or other bottlenecks.

Example of adding to the end of a LinkedList:

LinkedList<String> list = new LinkedList<>();
list.addLast("element"); // fast addition to the end