Cost and latency project

Question

Walk through a project where you reduced latency or cost without weakening correctness. Cover the baseline, bottleneck, alternatives, the change you owned, rollout safeguards, and measured result.

## Preparation

- Write the user or stakeholder, the constraint, and the decision in one sentence each.
- Choose one measurement or observable fact that can support the answer.
- Name one alternative and the reason it was not selected.

## Review checklist

1. Did I state the concrete constraint before describing the solution?
2. Did I separate my own decision and work from the team's work?
3. Did I name evidence or a measurement rather than relying on confidence?
4. Can I answer every follow-up without changing the original facts?

## Staged follow-ups

1. Separate queueing time from execution time.
2. Explain the correctness invariant you refused to trade away.
3. Describe the load test and production comparison.
4. Say what breaks at ten times the traffic.