> In fact, effectiveness of caching is arguably main reason for developer confidence to ignore premature optimisation or to postpone fixing probable performance

> In fact, effectiveness of caching is arguably main reason for developer confidence to ignore premature optimisation or to postpone fixing probable performance issue until detecting an issue. Actually caching is only a side of a multifaceted concept. Hence when one writes code, usually one isn't aware of all those different ways one's code is going to be optimized by the environment/setting.