Hi Dominique, > which means that -fexternal-blas should disable the inlining.
It is not surprising that a higly tuned BLAS library is better than a simple inlining for large matrices. I did some tests by adjusting n; it seems the inline version is faster for n<=22, which is not too bad. Regarding your other test case: This tests matrix*vector multiplication, which is not implemented yet :-) Regards, Thomas