Correct, but the difficulty is if your application must share the machine with any other application - even short lived ones. That, I think, is what joosters wa

Correct, but the difficulty is if your application must share the machine with any other application - even short lived ones. That, I think, is what joosters was alluding to. If the assumption that your application is the only consumer of system resources is broken, then you may see pathological scheduling behavior.