Developed and stabilized a CI performance benchmarking workflow for the sage-lib repository, enabling direct comparison of GitHub-hosted and Depot runners. Leveraging Bash and YAML within GitHub Actions, the work introduced parallel pipelines to measure install time, execution duration, and per-run cost, providing actionable data for infrastructure decisions. Addressed critical parsing and cost-metric issues by refining JSON payload generation and implementing job-level environment variables. Consolidated redundant steps into a composite action to streamline maintenance and added timeouts to prevent hanging jobs. These improvements delivered clearer cost models and enhanced reliability, supporting ongoing optimization of CI/CD processes and performance testing.