ELI5: Explain Like I'm 5

Overhead code

Okay kiddo, imagine a big factory that makes toys for you to play with. The factory has many machines that work together to make the toys, like the assembly line. The people who work in the factory have to do a lot of things to make sure the machines and the assembly line work properly.

Sometimes, the people have to stop the machines and fix them or clean them. This means that they have to stop making toys for a little while. When they stop making toys and focus on fixing the machines, it’s called ‘overhead’.

In computer coding, ‘overhead code’ means the extra code that doesn’t directly do what the computer program is supposed to do. For example, imagine a game where you have to jump over different obstacles. The main code for the game is what makes the jump happen when you press the space bar. But, there's also some overhead code that helps the game run more smoothly, like keeping track of the score, checking if the game has started, and showing you the information on the screen.

Just like in the toy factory, the overhead code in computer programs can take up time and resources. If there’s too much overhead code, it can slow down the program and make it run less efficiently. So, it’s important for programmers to review and reduce the overhead code when possible, just like how the people in the toy factory work to keep things running smoothly.

Does that make sense?