It also depends a lot on your CPU. Operations can be made faster by dedicating more resources to them. Most CPUs go for a slowish division operation that isn’t

It also depends a lot on your CPU. Operations can be made faster by dedicating more resources to them. Most CPUs go for a slowish division operation that isn’t too expensive in terms of resources, or lower-end ones don’t provide it at all and make you do it in software. Apple seems to have decided that integer division is pretty important, so they dedicated a lot of resources to it and the M1 does a divide in something like two cycles. Even thinking about loading from memory is probably slower than that.