It depends. You honestly never want to be the first one to a party and I try to avoid that very scenario. Also it actively annoys me if you are hosting a dinner party and someone shows up 15+ minutes early. I'm cooking food so that we can eat it at specific times, I'm stressed and may still be cleaning or tidying up, get there when the invitation said to get there and no earlier or later.

However if it's something important like a job interview then yeah, I'll get there 15 minutes beforehand.