検証結果：
Array length: 20 -------------------- insertionSort: 0.212ms heapSort: 0.299ms mergeSort: 0.903ms quickSort: 0.381ms Array length: 100 -------------------- insertionSort: 0.237ms heapSort: 0.107ms mergeSort: 0.131ms quickSort: 0.062ms Array length: 10000 -------------------- insertionSort: 56.804ms heapSort: 9.305ms mergeSort: 13.585ms quickSort: 5.577ms