Worked on core enhancements in the apache/iceberg and apache/iceberg-cpp repositories, focusing on path manipulation and performance optimization. Improved path handling in Java by refining RewriteTablePathUtil to address edge-case behaviors in relativize and newPath methods, ensuring data path correctness during table rewrites and expanding unit test coverage for reliability. In C++, optimized RoaringPositionBitmap’s AddRange function by replacing per-position loops with direct roaring::Roaring::addRange calls, resulting in faster range additions and alignment with the Java implementation. Comprehensive unit tests were added for both features, demonstrating a methodical approach to robustness and consistency across edge cases in both languages.