1. A method implemented in a printer for processing a PDF document for PDF direct printing, the printer including a first interpreter and a second interpreter, the method comprising: (a) analyzing characteristics of the PDF document; (b) based on the analysis of step (a) and a busy or error status of the first and second interpreters, automatically selecting the first interpreter or the second interpreter or both interpreters concurrently to be used to interpret the PDF document; and (c) based on the selection of step (b), interpreting the PDF document using the selected interpreter or interpreters.