Those two functions are currently my bottleneck. I am working with very large bitmaps.
How can I improve their performance?
Those two functions are currently my bottleneck. I am working with very large bitmaps.
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Those two functions are currently my bottleneck. I am working with very large bitmaps.
How can I improve their performance?
You could cache smaller versions of your bitmaps which you create before drawing the first time and then simply draw the downscaled samples instead of the full-blown 15 megapixel stuff.
Then again make sure you are only drawing what is necessary i.e. in ‘drawRect: (NSRect) rect’ only draw inside the rect (unless absolutely necessary). And try not do perform drawings outside of that method.