To turn it back around-- your entire codebase is on the hiker's back. They feel its aggregate weight with every step. It's all literally in the hot path. When

To turn it back around-- your entire codebase is on the hiker's back. They feel its aggregate weight with every step. It's all literally in the hot path. When bugs show up in the form of back pain, "pre-optimize everything" sounds like a sensible option to me.