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                # 高效繪圖 > 不必要的效率考慮往往是性能問題的萬惡之源。 ——William Allan Wulf ????在第12章『速度的曲率』我們學習如何用Instruments來診斷Core Animation性能問題。在構建一個iOS app的時候會遇到很多潛在的性能陷阱,但是在本章我們將著眼于有關*繪制*的性能問題。
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