Why quicksort vs merge sort

Thus, this is the fundamental difference between quicksort and merge sort. Aboveall, the functionality is the main difference between quicksort and merge sort. Another difference between quicksort and merge sort is that the quicksort works faster for small data sets while merge sort works in consistent speed for all datasets. Moreover, the space requirement is also an important difference between quicksort and merge sort.

Quicksort requires minimum space compared to merge sort. Furthermore, quicksort is not efficient for large arrays, but merge sort is more efficient than quicksort.

Hence, this is another difference between quicksort and merge sort. In summary, the main difference between quicksort and merge sort is that the quicksort sorts the elements by comparing each element with an element called a pivot while the merge sort divides the array into two subarrays again and again until one element is left.

Quicksort Algorithm Part 2, Education 4u, 15 Mar. Merge Sort Example, Education 4u, 15 Mar. She is passionate about sharing her knowldge in the areas of programming, data science, and computer systems. Figure 1: Quicksort.

Figure 2: Merge Sort. View all posts. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design.

Computer Organization. Discrete Mathematics. Ethical Hacking. Computer Graphics. Software Engineering. Web Technology. Cyber Security. C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. Quick Sort Quick sort is a comparison based sorting algorithm that follows the divide and conquer technique to sort the arrays. Suppose A is an array A[1], A[2], A[3],…….. The quick sort algorithm comprised of the following steps.

It possesses a good average case behaviour. The running time complexity of the quick sort is good that is it is faster than algorithms such as bubble sort, insertion sort and selection sort. However, it is complex and very recursive, that is the reason it is not suitable for large arrays. Merge sort is an external algorithm which is also based on divide and conquer strategy.

It uses additional storage for storing the auxiliary array. Merge sort uses three arrays where two are used for storing each half, and the third one is used to store the final sorted list. Each array is then sorted recursively. At last, the subarrays are merged to make it n element size of the array. Let A be the array of n number of elements to be sorted A[1], A[2], ………, A[n]. The merge sort follows the given steps.

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