Worked on the IBM/velox repository to enhance performance monitoring by implementing instrumentation for measuring compression and decompression timing within the table writer. Leveraged C++ and data engineering skills to introduce new DataSink::Stats fields, including numCompressedBytes, wallRecodeTimeNs, and compressionTimeNs, enabling detailed tracking of compression impact on throughput and latency. Integrated these metrics into the TableWriter’s logging system, supporting end-to-end observability and facilitating data-driven performance tuning and capacity planning. This work provided a foundation for SLA and trend analysis by quantifying system metrics, focusing on improving transparency and actionable insights for ongoing optimization of data processing workflows.