You still have to wait for your cache to reload from main memory, or for disk or network I/O, or for processes to be scheduled to run, so while it's likely more

You still have to wait for your cache to reload from main memory, or for disk or network I/O, or for processes to be scheduled to run, so while it's likely more efficient than epoll approaches, I doubt there's any really fundamental difference in the performance problems you would find.