How would you convey your idea to the team and stakeholders to improve the performance of a data pipeline from two hours to five minutes, given that stakeholders are happy with the current pipeline and don't want to change it?

To convince stakeholders to adopt a performance improvement plan for a pipeline that currently takes two hours and needs to be reduced to five minutes, I would start by gathering concrete metrics. I would benchmark the current run time, CPU, memory, and I/O usage, and then model the expected savings in cost and time. I would prepare a short demo or proof‑of‑concept that shows a 90% reduction in runtime on a representative dataset. I would frame the discussion around business impact: faster data availability means quicker reporting, lower storage costs, and the ability to run more frequent analytics. I would also address risk by proposing an incremental rollout: first optimize the slowest stage, then add caching or parallelism, and finally refactor the entire pipeline. I would emphasize that the changes are non‑intrusive to the existing logic and can be rolled back if needed. Finally, I would ask for a small pilot approval and commit to a clear timeline and success metrics. By focusing on data, ROI, and a low‑risk path, I can align the team and stakeholders around the performance goal while respecting their comfort with the current system.