Measure performance regressions
benchmarkskillsetup L2★0
Sheshiyer/skill-clusters ↗What it does
Measure page/API/build performance baselines and detect regressions
Best for
Catching performance regressions in real browser metrics before and after code changes or before shipping.
Inputs
- · target URLs or API endpoints
- · optional baseline snapshot for comparison
Outputs
- · Core Web Vitals (LCP/CLS/INP/FCP/TTFB)
- · resource breakdown (JS/CSS/image sizes)
- · before/after delta report
Requires
- · browser MCP
- · Core Web Vitals APIs
Preconditions
- · page deployed or running locally
- · URLs are reachable
Failure modes
- · network variability causes flaky measurements
- · third-party resources add uncontrollable noise
Trust signals
- · measures official Core Web Vitals (Google metric)
- · resource-level breakdown
- · concurrent load testing mode
- · before/after comparison with delta