Based on your profile, I'm assuming you're in your early 20s. When I was that age (15 years ago at this point), I had the same attitude. As I got older I started to feel the effects of bad diet and no exercise on my work and life.

I'm not saying that you shouldn't try to find ways to hack your sleep schedule or diet, but don't discount sleep as just wasted time in bed. If you don't treat your body right your mind will suffer.