What problem does it solve?
This Skill turns performance from a guess into evidence by measuring real runtime behavior against explicit budgets, so teams can catch regressions before they reach users.
Core Features & Use Cases
- Bundle analysis: Checks initial and route-level JavaScript size so you can spot oversized dependencies and shipping bloat.
- Real-user style metrics: Captures Lighthouse and Core Web Vitals on important routes to validate user experience under actual conditions.
- Database verification: Runs query-plan checks on hot paths to catch sequential scans, missing indexes, and N+1 patterns.
- Load validation: Supports short stress tests for traffic-sensitive changes and reports latency distributions and error rates.
- Use case: A checkout refactor changes the homepage bundle and adds a new database query; this Skill measures both, compares them to budget, and tells you whether the change is safe to ship.
Quick Start
Use the perf-measure skill to measure the current task’s bundle size, web vitals, and database query plans against the project’s performance budgets.
