That's not correct. In compiled languages, if for example denominator can be computed at compile time, it will almost certainly be optimized to use tricks, the

That's not correct. In compiled languages, if for example denominator can be computed at compile time, it will almost certainly be optimized to use tricks, the easiest one is to just convert it to a multiply. A division instruction can take a variable length of cycles to solve depending on the complexity of the division, it has terrible throughput and can be 100x slower than something like an addition, and that's on modern architectures! Did you ever notice how a calculator can sometimes take a visible amount of time to compute something, and sometimes it was instant? Some instructions are more expensive than others!