Track Performance Metrics

Measure and track performance baselines for the project:

1. Build the project and measure build time: npm run build
2. Bundle size analysis (if applicable): Run bundler with size reporting
3. Cold start time if this is a CLI/server tool
4. Run performance benchmarks if they exist

Create or update .perf-baseline.json with:

{
  "timestamp": "ISO-8601",
  "buildTime": "milliseconds",
  "bundleSize": "bytes",
  "coldStart": "milliseconds",
  "metrics": {...}
}

Detect performance regressions:

• If build time increased by >10%, flag as warning
• If bundle size increased by >5%, flag as concern
• Compare to previous day's baseline

Report findings with recommendations for optimization if regressions detected.