Modern CPU's are so complex I'm not convinced that one can reason about the performance implications of micro optimizations such as the div trick. Perhaps the 0

Modern CPU's are so complex I'm not convinced that one can reason about the performance implications of micro optimizations such as the div trick. Perhaps the 0.001% of developers that specialize in, and understand how said CPU's work might be able to, but for the rest of us, we have profilers. There are so many layers of abstraction and so much to understand in modern computing that it is a Bad Idea(tm) to tell engineers to not profile.