Here the first results of my comparison of cilk++ and openmp, on my application which is 3D meshgeneration. I have done here the first part which is octree-refinement + inserting triangles. The reference is a pthreaded version of the code.
Please consider, that these are first numbers. The difference between cilk++ and openmp is also due to the used compiler-version (but cilk is done only for the 4.2.4).