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GPGPU Algo Performance Characteristics

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Has there been any studies/reports/threads on the performance characteristics of GPGPU (e.g. DirectCompute) based image algorithms (Gaussian blur for example)? What's good? What's bad? Optimal thread count? etc...

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I don't recall seeing such a thread, but there isn't a definitive answer to the question since it depends on how a particular GPU operates. We have a chapter on image processing in our forthcoming D3D11 book that considers a few different ways to implement the technique, but really there is no standard optimum.

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