What you saying makes sense, but I am thinking that this may be false economy. It of course depends on the nature of background tasks, but likely they would hav

What you saying makes sense, but I am thinking that this may be false economy. It of course depends on the nature of background tasks, but likely they would have a chance to finish quicker on a performance core than on efficiency core and if main workload depends on those e.g. something generating an event, you still are probably going to get a performance penalty greater than if everything was running on P cores or if main task needs I/O and slow background process is blocking it for longer.