I've also found that not having some optimization mindset from the get go limits your product to achieve only a local maxima of performance in the end. It might

I've also found that not having some optimization mindset from the get go limits your product to achieve only a local maxima of performance in the end. It might not even be a good local maxima. It's best to have at least some optimization considerations from the start. I'm saying some because too much is a problem.