[rymax99]

There is no definite answer. If you use a cheap hosting provider that overloads their nodes on cheap hardware, you'll struggle regardless of what you rent from them. If your script is very inefficient, it'll also struggle even on decent hardware. Your best bet is to make sure whatever script you're using is halfway efficient and to rent a server from a provider that doesn't have too good to be true prices and that has a good reputation. That being said, I'd recommend nfoservers.com.