performance
Optimize web performance for faster loading and better user experience. Use when asked to "speed up my site", "optimize performance", "reduce load time", "fix slow loading", "improve page speed", or "performance audit".
Install
npx skills add addyosmani/web-quality-skills@performanceRuns in your terminal. Adds the skill globally for Claude Code, Cursor, Codex and others; add -g -y to skip prompts.
What it does
Performance optimization Evidence-led performance optimization using real-user signals for prioritization and browser traces for diagnosis. Focuses on loading speed, runtime responsiveness, and resource delivery. How it works 1. If a page can run, read the measurement workflow and establish a field-plus-lab baseline before editing. 2. Prioritize poor real-user Core Web Vitals. Use a DevTools performance trace and its focused insights to find the cause. 3. Inspect and change only the code or assets connected to measured bottlenecks. 4. Re-run equivalent lab measurements and report before/after…
Excerpt from the skill's own SKILL.md. Read the full file on GitHub before installing: skills run with your agent's permissions.
View source on GitHubBefore you install
Skills are plain text instructions the agent follows, sometimes with scripts. Check the source, prefer repositories with many installs and stars, and read any script it ships.
Categories
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