In short, do **not** poll. Not ever.
If you are doing something like this:
while (stillDontGotIt) {
sleepForAMomentAndHopeWeGetIt();
}
(or the obvious spin-and-try-lock variant).
Then you are doing it wrong.
It eats CPU, makes your app less responsive, eats battery life, and is less
efficient. Far far more efficient is to set up various triggers or points of
coordination -- queues, callbacks, run loop events, etc… -- through which your
app will be notified when something is ready to be processed.
b.bum_______________________________________________
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