The idea that sleeping less to work more will somehow make you more productive is as logical as the notion that not stopping for gas will help you arrive at your destination faster, reports Harvard Business Review.

When you don’t get enough sleep, you might find that you are more prone to forgetting things, have difficulties concentrating, retaining numbers, or encoding facts. All these problems will have a serious impact on your job performance, unless you are on autopilot, doing repetitive or routine-like work. But even when you’re doing relatively easy tasks, you may notice a drop in your performance. This is why sleep deprivation may feel a lot like a hangover: It makes focusing painful, and you may need to focus much more on tasks that came naturally to you before.