Merge Sort Performance
As we have seen, Merge Sort is O(n · log(n)). Despite requiring
extra storage, Merge Sort has a number of advantages:
- 39% fewer comparisons than Quicksort
- Merge Sort is inherently sequential:
- has good memory locality
and cache performance
- can be done with off-line media such as disk
- can be parallelized easily: parts of the input array can be
sorted independently by separate computers.
- can efficiently merge in updates to an existing sorted array
- If the highest element in the low sublist is less than the lowest
element in the high sublist, the merge can be omitted.