41. The non-transitory computer readable storage medium of claim 35 , wherein the stored processor-executable instructions are configured to cause a processor of a computing device to perform operations further comprising: completing HTML code computations for the generated DOM tree when it is determined that the generated DOM tree is not isomorphic with any of the one or more portions of the particular stored DOM tree; and storing the results of the HTML computations indexed with the generated DOM tree in the memory.
41. The non-transitory computer readable storage medium of claim 35 , wherein the stored processor-executable instructions are configured to cause a processor of a computing device to perform operations further comprising: completing HTML code computations for the generated DOM tree when it is determined that the generated DOM tree is not isomorphic with any of the one or more portions of the particular stored DOM tree; and storing the results of the HTML computations indexed with the generated DOM tree in the memory. 42. The non-transitory computer readable storage medium of claim 41 , wherein the stored processor-executable instructions are configured to cause a processor of a computing device to perform operations such that storing the generated DOM tree comprises 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.