"if you are in the very common circumstance in the computer world where the switching time is significantly less than the amount of progress than can be made on

"if you are in the very common circumstance in the computer world where the switching time is significantly less than the amount of progress than can be made on a given task in some time, then the optimum scenario is just to do work as it becomes available" ... and if you aren't, then clearly, by the way "if-then" statements work, the "then" clause doesn't apply.