Nasos,<br><br>Thanks for your time. I can&#39;t compile that code with generalized_vector_of_vector, I always get this error:<br><br>E:\Boost\boost_1_42_0\boost/numeric/ublas/vector_of_vector.hpp(301): error C2668: &#39;boost::numeric::ublas::ref&#39; : ambiguous call to overloaded function<br>
<br>I don&#39;t think that your test is slow, that is a huge amount of nodes and tetrahedrons. Also, this application has several sections which can be highly parallelized, but I will only deal with that much later. I&#39;m compiling in release mode, with NDEBUG defined and /O2 maximize speed.<br>
<br>Thanks,<br><br><br>x<br>