Well, it's just a code smell. Smelly code isn't necessarily wrong, it's just more likely to be wrong. Sometimes a piece of code needs to be highly optimized to

Well, it's just a code smell. Smelly code isn't necessarily wrong, it's just more likely to be wrong. Sometimes a piece of code needs to be highly optimized to the point of being basically unreadable, at that point it's probably worth adding explanatory comments that you would normally avoid.