HPX (High Performance ParalleX) is a general C++ runtime system for parallel and distributed applications of any scale. It is the first freely available, open source, feature-complete, modular, and performance oriented implementation of the ParalleX execution model. HPX is targeted at conventional architectures and, currently, Linux based systems, such as SMP nodes and conventional clusters. slis@gentoo.org Use dev-libs/jemalloc for memory allocation Use dev-util/google-perftools for memory allocation Use dev-cpp/tbb for memory allocation Use dev-libs/papi for NaCl