Methods, systems, and apparatus for improved dispatching of sheetsides in a high-speed (e.g., continuous form) printing environment using multiple, clustered processors in a print controller. Features and aspects hereof utilize a stochastic mathematical model of multiple processors (compute nodes) each adapted to RIP (rasterize) raw sheetside data provided to it. The model utilizes stochastic estimates of the probability of RIP execution time to select a preferred processor of the controller and dispatches the sheetside to the preferred compute node identified as providing best probability of meeting required deadlines for RIP completion time of a raw sheetside.