C-XSC is a C++ class library for scientific computing, with its main focus on reliable interval computations. Recently, several changes and new features have been implemented, making C-XSC much more suitable for tasks in high performance computing. However, these changes require that users take several factors into consideration when writing and compiling programs using C-XSC to get the best possible performance while still maintaining a sufficient level of numerical accuracy. This paper gives an overview of the most important points concerning these factors and tries to give background information and recommendations to the end user for the implementation of efficient C-XSC programs.
Remark: An accompanying extended version of this paper is available, see .