Worked on the OpenTTD/OpenTTD repository to address a performance issue in framerate computation. Focused on optimizing the loop responsible for summing frame durations, the developer improved both the accuracy of FPS calculations and the efficiency of rendering performance. By refining this core section of C++ code, the change reduced CPU overhead and enhanced frame timing precision, resulting in smoother gameplay and more reliable performance metrics. The solution was carefully scoped to maintain stability and ease of maintenance, demonstrating a methodical approach to performance optimization and bug fixing within a large codebase. Primary skills applied included C++ development and performance tuning.