Comment by juangacovas

Well, in my particular experience with juniors, it's astonishing the so many ways they have to make any code run slower than it has to be (besides the network and database queries), just by thinking 'nah, this is a computer and it can do millions of ops by second'. And that's why I always take the "premature optimization" dogma with a grain of salt while my life's miserable enough having to accelerate some other's stuff.