I think you're thinking of the "any optimization will be too diffcult, take too long, and cost too much" mindset. Which is a huge problem. Being mindful enoug

I think you're thinking of the "any optimization will be too diffcult, take too long, and cost too much" mindset. Which is a huge problem. Being mindful enough to identify when you're feeling the urge to optimize something too soon, will let you step back and optimize what will have the biggest impact once it's finished. I have seen developers spend hours optimizing some functionality, pick the fastest technique, and it turned out by designing everything to work with their earlier optimizations they made the overall system much slower.