And to continue on this tangent, if your code is multiplying by the constant 2 (e.g. "x = z * 2") the compiler's probably going to optimize that into a shift an

And to continue on this tangent, if your code is multiplying by the constant 2 (e.g. "x = z * 2") the compiler's probably going to optimize that into a shift anyway, so just keep the "* 2" to keep future human readers of the code happy.