Re: [eigen] checking for NaN

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2012/1/5 Radu B. Rusu <rusu@xxxxxxxxxxxxxxxx>:
> Benoit,
> You're correct of course, but the articles that I sent explain how the default x == x test is slower than manually
> crafted SSE optimizations. Is the suggestion you had regarding the eigen array operations faster than doing 4 individual
> checks? Is array1 == array2 nothing but for (int i = 0; i < 3; ++i) array1[i] == array2[i],

I checked the source (ArrayCwiseBinaryOps.h:89):


So we're just using std::equal_to, Eigen is not doing vectorization by
itself here.

Sorry I didn't take a look at your link before posting. I don't know
more on this subject, sorry :)


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