Actually, I half take back that suggestion to use clear/dump/start/ stop profiling; those are relic stub prims in the primitive table and ought to be excised sometime soon. Using the similar names as named prims in the null-module (ie they can be included in the vm like the powermanagement prim) should be fine. That would make them optional and they can be left out to save space when people want to make minimalist VMs.
tim