The biggest problem with a bubble sort is that it takes a very long time to run. For example, if there are 100 values to sort, each pass through the list will take 99 comparisons – and you might have ...

Each run through the list, from start to finish, is known as a pass. The bubble sort continues until a pass is made where no values have been swapped. At this point, the list is sorted. 4, 27, 7, 12, ...