Yuxn Chen developed an S3 Performance Testing Framework for the aws/aws-sdk-cpp repository, enabling reliable benchmarking of AWS S3 and DynamoDB services. The framework introduced a class-based test structure and integrated utilities for generating test data, error logging, and SDK version retrieval. Yuxn implemented a CMake-based build system with C++17 support, ensuring compatibility and maintainability for performance tests. The work included code quality improvements such as optimizing data structures and refining build configurations. By establishing repeatable performance measurements, Yuxn’s contributions supported data-driven optimization and risk reduction for performance regressions, demonstrating depth in C++, CMake, and software design.