Learn to use a profiler for your programming language. It will tell you what’s worth optimizing in your programs. I.e. if your program spends only 10% of the ti

Learn to use a profiler for your programming language. It will tell you what’s worth optimizing in your programs. I.e. if your program spends only 10% of the time talking to others than that may be the maximum you can optimize by choosing a fancy communication pattern.