In this paper, we propose the Templet -a runtime system for actor programming of high performance computing in C++. We provide a compact source code of the runtime system, which uses standard library of C++ 11 only. We demonstrate how it differs from the classic implementations of the actor model. The practical significance of the Templet was examined by comparative study on the performance of three applications: the reference code in C ++, managed by the OpenMP; the actor code in C ++, managed by the Templet; the actor code in Java, managed by the Akka. As a test problem we used a numerical algorithm for solving the heat equation.