Java ProActive vs. Fortran MPI: Looking at the future of parallel Java

About ten years after the Java Grande effort, this paper aims at providing a snapshot of the comparison of Fortran MPI, with Java performance for parallel computing, using the ProActive library. We first analyze some performance details about ProActive behaviors, and then compare its global performance from the MPI library. This comparative is based on the five kernels of the NAS parallel benchmarks. From those experiments we identify benchmarks where parallel Java performs as well as Fortran MPI, and lack of performance on others, together with clues for improvement.