How would you describe a perfect algorithm?

Question

how would you describe a beyond good algorithm

Answer 1

Less time complexity and low memory use. you cannot say one is better then all. Every algorithm has some pros and cons. like binary search is fast and good then linear search but if the input data is sorted. But interpolation search is better then binary but data need to be sorted and equally distributed.

Answer 2

it doesn't use much memory, it's fast and reliable, covers all possibilities, it's efficient

Answer 3

it fullfills its task in the least amount of time. so it avoids unneccesary calculations