Jianlong Long contributed to the OpenXiangShan/XiangShan repository by focusing on performance and configuration optimization for production readiness. He upgraded the CoupledL2 and Utility submodules to newer commits, then tuned parameters in L2Top.scala to improve both functionality and efficiency. By adjusting counters in Parameters.scala, he enhanced configuration accuracy and flexibility, supporting faster iteration cycles. His work involved close collaboration with cross-team contributors to ensure seamless integration of these changes. Utilizing his expertise in Scala, full stack development, and system architecture, Jianlong delivered a targeted feature that deepened the project’s configurability, though the scope was limited to a single feature.