A method for transforming data structures includes processing a portion of a source data structure (SDS) with a first processing resource by associating the first processing resource with a target data structure (TDS) key element located in a key position of a queue, determining whether the queue includes an SDS node element corresponding to the key position, processing the SDS node element responsive to determining that the queue includes the SDS node element corresponding to the key position, wherein the processing the SDS node element comprises retrieving the SDS node element from the queue, processing the retrieved SDS node element to generate a resultant TDS node element, outputting the resultant TDS node element to an empty key position in the queue, and mapping the resultant TDS node element to the TDS.