In most cases, the most competent applicants are no longer on the market after ten days. An executive candidate may be on the market for less than ten days if they are more likely to be sourced or receive many offers.
However, keep in mind that passive candidates, who are usually already employed, make up a significant market share. You will be able to fill some roles faster if you reach out to them and create relationships. And, according to a recent LinkedIn poll, nearly all of them want to hear from a recruiter.