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 a CMake-based build system with C++17 support, focusing on maintainability and repeatable performance measurements. Yuxn implemented utilities for generating test data, error logging, and SDK version retrieval, while refining build scripts and optimizing code for reliability. By addressing code quality through improvements such as safer client handling and better data structures, Yuxn’s work established a foundation for data-driven optimization and risk reduction in performance regressions within the project.