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lang-matlab
myArray(:) = 0is slow - it's moving loads of zeros from the CPU to the GPU for no reason. That doesn't mean MATLAB GPU capabilities are implemented poorly, it means you need to know how to use them; trymyArray = gpuArray.zeros(size(myArray))instead.a = a - a;" does not necessarily result in an array of all zeros, so I would avoid this pattern (hint: what if 'a' containedNaNorInf?). (And rather contact The MathWorks with the details of your performance problem).