1. A computer-implemented method, comprising: monitoring dynamic page generation events associated with a set of one or more Uniform Resource Locators (URLs), said monitoring comprising maintaining statistical data regarding how frequently particular content retrieval tasks are performed as part of the dynamic page generation events; generating, based at least partly on the statistical data, a mapping table that maps the set of one or more URLs to a set of content retrieval tasks, said mapping table stored in computer memory; and responding to a page request from a user computing device by determining that the page request corresponds to at least one of the set of one or more URLs, and by using the mapping table to identify at least one content retrieval task to perform preemptively, said method performed in its entirety by a computing system that comprises a server machine.