During December 2024, M. Moller contributed to the gismo/gismo repository by optimizing memory usage in multi-patch refinement functions. He refactored the refinement direction parameter, changing its type from int to short_t, which reduced the memory footprint while maintaining the existing functionality and public API. This adjustment aligned with the codebase’s conventions and set the stage for future performance improvements. Working exclusively in C++ and applying software engineering best practices, Moller ensured the changes were focused and low-risk, with no regressions introduced. The work demonstrated a targeted approach to maintainability and efficiency within a complex C++ codebase.