20. The computing device of claim 19 , wherein means for storing the generated DOM tree comprises means for storing at least a portion of the generated DOM tree in a key-value data structure in which DOM tree elements are stored in association with the corresponding HTML computation results.
21. The computing device of claim 20 , wherein means for storing at least a portion of the generated DOM tree in a key-value data structure comprising means for storing at least a portion of the generated DOM tree in a hash-map data structure.