What are some solid resources for learning more about optimization? I graduated from a bootcamp, and at both jobs I have had I ask my leads about optimization a

What are some solid resources for learning more about optimization? I graduated from a bootcamp, and at both jobs I have had I ask my leads about optimization and making it run even faster and am often told that we don't need to worry about it because of how fast computers are now. But I am sitting there thinking about how I want my stuff to run like lightning for every system.