Is destroyDrawingCache() expensive operation ??
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If you call
buildDrawingCache()manually without callingsetDrawingCacheEnabled(true), you should cleanup the cache by callingdestroyDrawingCache()afterwards.You should avoid calling this method when hardware acceleration is enabled. If you do not need the drawing cache bitmap, calling this method will increase memory usage and cause the view to be rendered in software once, thus negatively impacting performance.