- About data scan: Apriori needs to scan the database repeatedly to accumulate a k-item supportand check the frequency. On the other hand, FP-growth algorithm needs 2 scan, once to identifyfrequent1-item set and second to build FP-tree.- About candidate generation: Apriori algorithm generates exponential number of candidate setand the self-join process of candidate generation itself is expensive. FP-growth algorithm doesnot generate any candidate set