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As a result ArrayList is slower than LinkedList and the latter is preferred in case you need to perform insert and delete operations in the middle of a collection.LinkedList worked 200 times faster than ArrayList when 0.1 million elements were inserted at the start of the collection.
Similarities Between Array and ArrayList. 1. add and get method: Performance of Array and ArrayList are similar for the add and get operations .Both operations runs in constant time. 2. Duplicate elements: Both array and arraylist can contain duplicate elements. 3.