Processing time spent per one second of observing duration as a function of number of processing units are shown for two parallelization methods. In the bash-script method, the time spent by the multiple RFIClean instances, for concatenating the partial data products, and the total time are shown separately using the red, blue and orange symbols. The time spent using the OpenMP method is shown in black. The blue curve shows the theoretical gain offered by an n-unit parallelization which splits perfectly the workload, based on the average normalized execution time obtained from the serial bash-script method (i.e., for a single processing unit; 1.24 seconds/second).