web-performance-optimization
Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance
Profile →npx skills add sickn33/agentic-awesome-skills --skill web-performance-optimization --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Web Performance Optimization ## Overview Help developers optimize website and web application performance to improve user experience, SEO rankings, and conversion rates. This skill provides systematic approaches to measure, analyze, and improve loading speed, runtime performance, and Core Web Vitals metrics. ## When to Use This Skill - Use when website or app is loading slowly - Use when optimizing for Core Web Vitals (LCP, FID, CLS) - Use when reducing JavaScript bundle size - Use when improving Time to Interactive (TTI) - Use when optimizing images and assets - Use when implementing caching strategies - Use when debugging performance bottlenecks - Use when preparing for performance audits ## How It Works ### Step 1: Measure Current Performance I'll help you establish baseline metrics: - Run Lighthouse audits - Measure Core Web Vitals (LCP, FID, CLS) - Check bundle sizes - Analyze network waterfall - Identify performance bottlenecks ### Step 2: Identify Issues Analyze performance problems: - Large JavaScript bundles - Unoptimized images - Render-blocking resources - Slow server response times - Missing caching headers - Layout shifts - Long tasks blocking main thread ### Step 3:
- Overview
- When to Use This Skill
- How It Works
- Step 1: Measure Current Performance
- Step 2: Identify Issues
- Step 3: Prioritize Optimizations
- Step 4: Implement Optimizations
- Step 5: Verify Improvements
- Examples
- Example 1: Optimizing Core Web Vitals
- Example 2: Reducing JavaScript Bundle Size
- Example 3: Image Optimization Strategy
- Best Practices
- ✅ Do This
Test with throttling lighthouse https://yoursite.com --throttling.cpuSlowdownMultiplier=4 Analyze bundle npx webpack-bundle-analyzer dist/stats.json
What does the web-performance-optimization skill do?
Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance
How do I install it?
Run `npx skills add sickn33/agentic-awesome-skills --skill web-performance-optimization --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From sickn33/agentic-awesome-skills, a repository with 44,414 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.