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    Just as a side note graphics use an algorithm that has to access every piece of a matrix. However, the GPU is specialized to handle this in a time-efficient way. Commented May 23, 2013 at 21:04
  • Yes, GPU does this in a massively-parallel way; the question was about a single thread of execution, I suppose. Commented May 23, 2013 at 22:16
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    One of the reasons labels tend to be suspect is because there's often an alternative. In this case you could return instead. Commented Jan 30, 2019 at 11:24