HashMap is a powerful data structure that has a broad application, especially when fast lookup time is needed. Yet, if we don't pay attention to details, it can get suboptimal.
In this tutorial, we'll take a look at how to make HashMap as fast as possible.
2. HashMap‘s Bottleneck
HashMap‘s optimistic constant time of element retrieval (O(1)) comes from the power of hashing. For each element, HashMap computes the...