I'm adding few more points for justifying why QuickSort is better than other sorting algorithms with same asymptotic complexity O(nlogn) (merge sort, heap sort). 25: 43: Avg. 17: 19: Max. Both use Divide and conquer strategy. Great answers here. Mergesort uses extra space proportional to N. Pf. Twitter Facebook Google+ LinkedIn UPDATE : Check this more general comparison ( Bubble Sort Vs Selection sort Vs Insertion Sort Vs Merge Sort Vs Merge Sort Vs Quick Sort ) Before the stats, You must already know what is Merge sort, Selection Sort, Insertion Sort, Arrays, how to get current time. VS. Quicksort. The array aux[] needs to be of length N for the last merge. 22.7: 24.4: Time (seconds) Min. 47.8: 48.4: According to these results, merge sort is a bit faster on average than quick sort. Merge sort and quick sort are typical external sort since they can divide target data set and work on the small pieces loaded on memory, but heap sort is difficult to do that. 17 Mergesort analysis: memory Proposition. So which algorithm is faster on average? 51.6: 75.8: Avg. Merge Sort is a recursive algorithm that is used in most of the servers and applications that require sorting procedures. 42.6: 36.7: Max. For large data sets, which is actually our main concern, the merge sort is definitely more effective than most other algorithms in terms of time. It means that Quick sort does not require any additional memory while executing. Def. Insertion sort, selection sort, shellsort. stable or unstable As Karan Suraj mentioned Merge sort is only the stable sorting among the three. Both Quick Sort and Merge Sort algorithms are based on the divide and conquer approach for sorting. A sorting algorithm is in-place if it uses ≤ c log N extra memory. They basically work on the same principle – to divide a problem into two or more sub-problems and then solve them recursively. Quick sort is an IN-PLACE Algorithm while Merge sort is not. Merge Sort vs Quick Sort. Motivation. Let’s start with a table that summarizes the results of 2000 random runs: Merge Sort Quick Sort; Comparisons Min. However, they differ by the methods used to perform the split and the merge procedures. Ex. It is one of the fastest methods to sort a data set and more importantly, it requires minimum time to do so. void […] Merge Sort. phone: 500$ bike: 100$ knife: 10$ purse: 60$ shoe: 70$ calculator: 15$ keyboard: 40$ shovel: 20$ lawnmower: 200$ scissors: 5$ scissors: 5$ knife: 10$ calculator: 15$ shovel: 20$ keyboard: 40$ purse: 60$ shoe: 70$ bike: 100$ lawnmower: 200$ phone: 500$ The ideal sorting … Numerous computations and tasks become simple by properly sorting information in advance. Selection Sort Complexity is O(n^2). Merge Sort. But the differences are 1. Summary of Quick Sort vs.