and it can control , uh , how many it runs simultaneously.
So " run command " doesn't use P - make , or  ?
It uses " export " underlyingly. But , if you  i It 's meant to be run one job at a time ? So you could fire off a thousand of those , and it doesn't know  any one of those doesn't know about the other ones that are running.
So why would one use that rather than P - make ?