What problem does it solve? After applying performance and cost optimizations to a migrated system, teams need proof that changes actually improved performance without introducing regressions. This Skill systematically measures before/after metrics, runs regression and stability tests, and produces a stakeholder-ready optimization report. ## Core Features & Use Cases - Performance Benchmarking: Compares throughput, latency (P50/P95/P99), and resource utilization against the initial baseline. - Regression & Stability Testing: Confirms unit, integration, and E2E tests pass and runs extended load tests to detect memory leaks or instability. - Cost & ROI Analysis: Calculates actual infrastructure savings and payback period for the optimization effort. - Use Case: After tuning a migrated Spring Boot application (query fixes, virtual threads, connection pooling), use this Skill to validate a 45% P95 latency improvement, confirm zero regressions, and produce an optimization_report.md for stakeholder sign-off before Hypercare. ## Quick Start Validate the optimizations documented in optimization_code_improvements.md against the baseline and generate the final optimization report.