Are you guys hiring? xD Just to expand on your point: Sure you can let a chunk of code take a few seconds longer than it could with little overall effect. Bu

Are you guys hiring? xD Just to expand on your point: Sure you can let a chunk of code take a few seconds longer than it could with little overall effect. But stack a hundred of these up and all those seconds compound and suddenly become immensely important. A suit of armour with a million chinks isn't very effective armour. (As an aside, depending on your use case, it can be worth optimizing the big bottlenecks, high use, computationally expensive, etc. components and not worry too much about the rest)