#### Java / Map and its implementations

# Is HashMap faster compared to ArrayList in terms of search?

The ArrayList has O(n) performance for every search, so for n searches its performance is O(n^2).

The HashMap has O(1) performance for every search (on average), so for n searches its performance will be O(n).

While the HashMap will be slower at first and take more memory, it will be faster for large values of n.

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