Efficient Storage and Retrieval of Resources for Rendering Structured Documents

In one embodiment, a method includes accessing local storage on the computing device. The local storage includes multiple local-storage slots that each currently correspond to a domain or sub-domain and includes one or more resources for a structured document associated with the particular domain or sub-domain. Each of the resources has a timestamp indicating when it was last used by the computing device. The method further includes identifying based on the timestamps one or more resources to be discarded from the local storage.