Why would you use GNU parallel if you have to implement your own non-trivial pre- or post-processing logic anyway? Just spawn the worker processes yourself. GN

Why would you use GNU parallel if you have to implement your own non-trivial pre- or post-processing logic anyway? Just spawn the worker processes yourself. GNU parallel is great if you have, e.g., a bunch of files, each of which needs to be processed individually, like running awk or sed over it. Then you can just plop parallel in front and get a speedup for free. That's not what parsort does.