The answer
Yes. Modern programming languages use highly optimized algorithms (like TimSort or IntroSort) that guarantee O(N log N) performance.
O(N log N) Time: The Gold Standard for Sorting
Are built-in sorting functions O(N log N)?
More FAQs in O(N log N) Time: The Gold Standard for Sorting
It is a hybrid complexity that combines a linear operation with a logarithmic operation. It is the defining time complexity of optimal sorting algorithms.
Mathematical proofs show that any sorting algorithm relying on comparing elements against each other requires at least O(N log N) comparisons in the worst case.
Merge Sort, Heap Sort, and the average case of Quick Sort all operate in O(N log N) time.
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