What are some key algorithms in C++ and their performance?

What are some key algorithms in C++ and how do they perform?

In C++, some key algorithms include sorting algorithms like Quick Sort and Merge Sort, and searching algorithms like Binary Search. Their performance can vary based on the data structure used and the size of the dataset.

Can you explain the time complexity of Quick Sort?

Quick Sort has an average time complexity of O(n log n), but in the worst case, it can degrade to O(n^2) if the pivot selection is poor.

What about Merge Sort? How does it compare?

Merge Sort consistently performs at O(n log n) for all cases, making it more reliable than Quick Sort in terms of worst-case performance.

Are there any scenarios where I should prefer Quick Sort over Merge Sort?

Yes, Quick Sort is often faster in practice due to lower constant factors and better cache performance, especially for large datasets.