Fei Chen worked on GPU buffer management optimization in the CodeLinaro/onnxruntime repository, focusing on improving memory efficiency for GPU workloads. By refactoring the BucketCacheManager in C++, Fei moved buffer release logic from the OnRefresh method to ReleaseBuffer, enabling earlier buffer deallocation and reducing both peak and average GPU memory usage. This change clarified the buffer lifecycle and improved maintainability without introducing performance regressions, as validated through critical path testing. Fei’s work demonstrated strong skills in C++ development, GPU programming, and performance optimization, addressing memory management challenges and enhancing the scalability of GPU-based systems within the project’s architecture.