joel falcou wrote:
Beware that running ''some tests'' on arbitrary large array of any kind must take into account the fact that you may induces cache misses
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I actually wrote a thesis on the subject and still struggle to get a decent library out of all my experiments.There is some prototype of it but it's nowhere completed (NT2 on sourceforge for reference) in which I use Epression tempalte to evaluates at compile time a somewhat optimal tiling size. If needed I can reinject my experiments results here so we can all brainstorm about this but I think the problem of "easy-to-use and good performances" numeric data container is not easy and not currently addressed anywhere
I think BLITZ++ used to have some very good performance comparisons with Fortran IIRC. (What ever happend to BLITZ++? Is it dead?) I understood the thread to be about doing the same operation on the same data, using multi_array versus doing the pointer arithmetic yourself. I am actually interested about the iterators performance in multi-array too, since their iterators seem to just wrap indexes. That _seems_ like it would be bad, but Idunno. --John