1. A method of processing data using a plurality of computational nodes, each node performing a corresponding operation in a data flow for data received at that node, wherein each node is implemented by a first processor and utilizes second special-purpose processor, and said method comprising: determining, via the first processor, a compression benefit metric pertaining to performance of the corresponding operations of one or more of said plurality of computational nodes in the data flow with recompressed data, wherein determining a compression benefit metric further determines a priority for recompressing data based on the compression benefit metric; recompressing the data according to the priority, via the second special-purpose processor, for processing by the one or more computational nodes in the data flow based on the compression benefit metric indicating a benefit in processing performance gained by using the recompressed data for computational operations; and performing the corresponding operation using the recompressed data, via the first processor, to provide the benefit in processing performance.