ELI5: Explain Like I'm 5

Lazy deletion

Okay kiddo, let's talk about lazy deletion.

Imagine you have a big box of toys. When you want to get rid of a toy, you may throw it away in the trash. Now imagine you have a special toy box that has a separate section just for toys you want to get rid of. When you decide you don't want a toy anymore, you put it in that section instead of throwing it away right away. That's what lazy deletion is like.

When we talk about lazy deletion in computer science, we're talking about how we delete things from a computer's memory. Let's say we have a big list of things, like a data file with a bunch of different types of information. If we want to delete one item from that list, we have a few choices. We can just get rid of it completely, like throwing it in the trash, or we can mark it as something we want to delete later. Lazy deletion is when we choose to mark it instead of deleting it right away.

Why would we do this? Well, sometimes deleting things completely can take time and resources. Think about it like this - if we wanted to throw away every single toy we didn't want anymore immediately after deciding we didn't want it, we'd have to keep going back and forth to the trash can. That would slow us down and make the whole process take longer.

So by lazy deleting, we just mark that item as something we want to get rid of, but we don't get rid of it yet. It's still there in the list, but it's marked so we know we don't want it anymore. This saves us time and resources, because we can go back later and delete all the things we've marked at once instead of doing it one at a time.

Overall, lazy deletion is just a way to be more efficient with our time and resources when we're working with big lists or files in a computer. Instead of getting rid of things immediately, we mark them as something we want to get rid of later. This way, we can do the deleting in one big batch instead of having to do it constantly one at a time. Pretty cool, huh?