Worked on the ROCm/onnxruntime repository to deliver a targeted performance optimization for large tree ensemble models. Focused on the CheckIfSubtreesAreEqual function, the developer refactored the code to pass indices as a const reference instead of by value, which eliminated unnecessary vector copies during deep recursive calls. This change, implemented in C++, leveraged const-correctness and recursion optimization techniques to reduce model loading times from approximately 18 minutes to just 4 seconds for models with millions of nodes. The work demonstrated strong skills in algorithm design, performance profiling, and impact-driven code review, resulting in lower memory overhead and faster model deployment.