Should I pump for 30 minutes?

I'm really torn about this one, guys. Should I pump for 30 minutes? I've heard that some people swear by it, saying it helps boost their performance and endurance. But then there are others who say it's a waste of time and doesn't really do much. I'm not sure which side to believe. On one hand, I want to give it a try and see if it really works for me. But on the other hand, I don't want to waste my time if it's not going to make any difference. What do you think? Should I pump or should I skip it? Any advice would be greatly appreciated.