How Good is Selection Sort?

Time Efficiency:

• Best Case: It takes about $O(n^2)$ time.
• Average Case: Still around $O(n^2)$ time.
• Worst Case: Again, about $O(n^2)$ time.

How It Compares to Other Sorts:

• Bubble Sort: It works similarly with $O(n^2)$ time.
• Insertion Sort: This one is faster in the best case with $O(n)$ time.

Memory Use:

• Space Complexity: It uses $O(1)$ space because it sorts the items in place.

Selection sort is usually not the best choice for sorting big lists. There are better methods, like quicksort or mergesort, which can sort with an average time of $O(n \log n)$.