Android - How efficient is it to use handler thread for long delay?

Question

So...I have this handler thread to do something after some time has passed. This time could be a few seconds or could be minutes or hours. The question is:

How efficient is it to use a handler.postDelayed thread for a delay that could be that long in terms of memory and cpu usage etc.. (I can make sure it won't be killed by the system because so that is not an issue )

final Handler handler = new Handler();
handler.postDelayed(new Runnable(){
    @Override
    public void run() {
             .
             .
             .
             .
    }
},delay});