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• Does Duff's Device Speed up Java Code?

  - by bmargulies

  Using the stock Sun 1.6 compiler and JRE/JIT, is it a good idea to use Duff's Device to unroll a loop? Or does it end up as code obfuscation with no performance benefit.

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• Can I use Duff's Device on an array in C?

  - by Ben Fossen

  I have a loop here and I want to make it run faster. I am passing in a large array. I recently heard of Duff's Device can it be applied to this for loop? any ideas? for (i = 0; i < dim; i++) { for (j = 0; j < dim; j++) { dst[RIDX(dim-1-j, i, dim)] = src[RIDX(i, j, dim)]; } }

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