Amdahl's law

Amdahl’s Law is a way of understanding how much faster a computer can get when it is changed in a certain way. To understand it, you need to imagine a computer that takes 5 minutes to finish a task. Now, you can make one part of the computer twice as fast, so that it only takes 2.5 minutes to finish the task. That sounds good, right? But it turns out that isn’t always the case. Amdahl’s Law says that if only one part of the computer is made twice as fast, the whole computer won’t finish the task twice as fast - it will only be a little bit faster, like maybe 1.5 minutes. This is because not every part of the computer can be made faster. Some parts have to stay the same, and it’s those parts that slow everything down. So if you want your computer to get faster, you have to make more than one part faster, or find other ways to make the task faster.