OS X Mavericks was more of an Under the Hood tune up than an iOS overhaul. While Apple has promised more power and better battery life, it says it will improve CPU performance in a huge way. by 72 percent.
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How is that even possible? First of all, ‘Time Coalescing, smooths out the curve of usage, instead of tradition passive and active states. Apple has also improved Safari to make it more efficient than both Chrome and Firefox.
“App Nap” is another improvement that helps OS 10.9 focus on what your doing, so background Apps don’t eat up CPU or Battery life.
This is all looking great on paper, but the jury is out until we get our hands on it.