Speed considerations, though not precisely big-O, certainly applies to the database design and how you call it. And it must apply in many other areas. How many

Speed considerations, though not precisely big-O, certainly applies to the database design and how you call it. And it must apply in many other areas. How many sites have you visited that takes more than 10 seconds to load lately? How many "cloud-based" programs have you used that takes far longer than it should to do basic operations? I know I can name quite a few.