Summary
Covers the essentials for speeding up modern web apps: React code splitting with lazy loading, webpack bundle optimization, service worker caching strategies, and Core Web Vitals monitoring with the Performance Observer API. Includes practical configs for nginx compression and image optimization with responsive srcsets. The monitoring code is updated for INP instead of the deprecated FID metric, which matters if you're tracking against current standards. Good reference when you're trying to get LCP under 2.5s or need to explain to stakeholders why bundle sizes matter. The checklist format makes it easy to audit what you've already done versus what's still dragging down your Lighthouse score.
Install to Claude Code
npx -y skills add secondsky/claude-skills --skill web-performance-optimization --agent claude-codeInstalls into .claude/skills of the current project.
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →
On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
Files
SKILL.md
Select a file.
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
