Haixiao Yan developed a performance optimization feature for the zephyrproject-rtos/poky repository, focusing on enhancing random number generation in embedded environments. By backporting a patch to glibc’s random.c, Haixiao introduced a single-threaded fast path for rand() and __random(), which improves execution speed and reduces startup latency in single-threaded system builds. This work required deep expertise in C library development, system programming, and performance optimization, ensuring deterministic behavior for embedded applications. The patch was fully integrated and prepared for QA and release testing, demonstrating a thorough approach to patch traceability and compatibility within the broader Zephyr project integration workflow.