Apparatus for and methods of rethermalizing a package of refrigerated or frozen food are disclosed. The common node is coupled to the current source, and the two output nodes are coupled to an impedance load. The compiling of code including receiving a first compiler directive specifying an operator sub-graph included in the operator graph, the operator sub-graph containing one or more processing elements from the plurality of processing elements. Advantageously, a user to may displace excretions downwardly into the bag while seated on the present invention. At least one of the data length of the source data and the data length of the output sequence is variable. Coding algorithms are used to get fast read speed of this multi-level cell DRAM.