Contributed to JetBrainsRuntime by enhancing both benchmarking stability and API ergonomics in Java. Addressed a recurring IllegalArgumentException in the TreeMapUpdate benchmark by introducing a comparator-aware strategy that conditionally applies subMap, headMap, or tailMap, improving reliability in performance regression detection and reducing CI flakiness. Additionally, implemented default min and max methods in the Comparator interface, streamlining common comparison operations and reducing boilerplate. Ensured robust functionality through comprehensive unit testing and maintained backward compatibility across the repository. Leveraged expertise in Core Java, API design, and benchmarking to deliver targeted improvements that strengthened code quality and continuous integration reliability.