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web-performance-optimization - Optimize website and web application performance

Measure, analyze, and improve loading speed, Core Web Vitals, bundle size, caching, and runtime performance.

Tags

Updated: 2026-10-01
web performanceCore Web VitalsLighthousebundle optimizationimage optimizationcaching

Capabilities

Measure performance metricsRun Lighthouse auditsAnalyze network waterfallsIdentify performance bottlenecks

Typical Inputs

Website or web application codeImages and web assetsBuild configuration

Typical Outputs

Performance audit resultsOptimization recommendationsUpdated code and configuration

What this skill does

  • Measure performance metrics
  • Run Lighthouse audits
  • Analyze network waterfalls
  • Identify performance bottlenecks
  • Optimize images and assets
  • Reduce JavaScript bundle size
  • Implement code splitting
  • Configure caching headers
  • Lazy-load noncritical resources
  • Verify optimization results

Inputs

  • Website or web application code
  • Images and web assets
  • Build configuration
  • Server configuration
  • Performance metrics
  • Network conditions
  • Target devices

Outputs

  • Performance audit results
  • Optimization recommendations
  • Updated code and configuration
  • Optimized image assets
  • Before-and-after metrics
  • Improved Core Web Vitals

Requirements

    Source

    • Spec: SKILL.md

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