2. The computer-implemented method of claim 1 , further comprising determining a frequency of requests for the web content associated with the first URL, and prioritizing categorization of the first URL based at least in part on the frequency of requests.
2. The computer-implemented method of claim 1 , further comprising determining a frequency of requests for the web content associated with the first URL, and prioritizing categorization of the first URL based at least in part on the frequency of requests. 3. The computer-implemented method of claim 2 , wherein the time at which the category is determined is based on the frequency.