During March 2026, Sam contributed to the google/tcmalloc repository by implementing CPU cache profiling for the memory allocator. He developed a feature that tracks the total number of CPU caches touched during allocation operations, integrating this metric into the existing mallocz proto data to enhance profiling fidelity and observability. Working primarily in C++, Sam focused on memory management and performance optimization, ensuring the new instrumentation provided end-to-end traceability without introducing instability. Although no major bugs were addressed during this period, his work demonstrated a thoughtful approach to extending tcmalloc’s profiling capabilities while maintaining the project’s overall quality and reliability.