web_performance_optimization
Skill3 starsChanged 2 months agoMITView on GitHub
Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance.
1 other project uses a version of this, 1 of them edited.
Adopted by
Most recently taken up by
- krishnakanthb13/antigravity_global_skillsedited, first seen Jul 4, 2026
Other versions1 project uses a version of this.
Word for word · 0
None found.
Edited · 1
- krishnakanthb13/antigravity_global_skills★ 50100% same
Wrote their own version · 0
None found.
How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.
In this repository46 other files it gives its agents.
- agy-customizationsSkill
- antigravity-guideSkill
- api-and-interface-designSkill
- browser-testing-with-devtoolsSkill
- ci-cd-and-automationSkill
- code-review-and-qualitySkill
- code_reviewSkill
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- deprecation-and-migrationSkill
- document_apiSkill
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- enhance_uiSkill
- frontend_designSkill
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- generate_release_imageSkill
- git-workflow-and-versioningSkill
- idea-refineSkill
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- impeccableSkill
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- list_featuresSkill
- open_source_prepSkill
- optimize_codebaseSkill
- performance-optimizationSkill
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The file
We split this skill into the rules it gives an agent
2 rules. About 0 are common, 2 are distinctive, and 0 are very specific to this project.
≈0
Common · estimate
Many files like this have a rule of this kind.
≈2
Distinctive · estimate
This author's own choices. Worth a look.
0
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Distinctive: line 15
Check bundle sizes and network waterfall
- Distinctive: line 39
If coordinating optimization across the entire stack:
≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
Web Performance Optimization
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.
Workflow
- Measure Current Performance:
- Run Lighthouse audits
- Measure Core Web Vitals (LCP, FID, CLS)
- Check bundle sizes and network waterfall
- Identify Issues:
- Large JavaScript bundles or unoptimized images
- Render-blocking resources
- Layout shifts or slow server response times
- Prioritize Optimizations:
- Focus on high-impact improvements (critical rendering path, image optimization, code splitting).
- Implement Optimizations:
- Optimize assets, add caching headers, lazy load non-critical resources.
- Verify Improvements:
- Compare before/after metrics and monitor real user metrics.
Core Strategies
- Images: Convert to WebP/AVIF, implement responsive images, specify dimensions, and use lazy loading.
- JavaScript: Keep bundles under 200KB. Code split and remove unused dependencies. Delay non-critical JS.
- CSS: Inline critical CSS, defer the rest, remove unused CSS.
- Core Web Vitals Guide:
- LCP (< 2.5s)
- FID (< 100ms)
- CLS (< 0.1)
End-to-End Optimization (Advanced)
If coordinating optimization across the entire stack:
- Performance Profiling & Observability: Generate flame graphs (CPU) and heap dumps (memory) to identify hot paths. Assess distributed tracing (OpenTelemetry) and APM tool integration.
- Database & Backend: Analyze slow query logs, create missing indexes, optimize execution plans, implement query result caching (Redis). Fix N+1 queries. Implement pagination and response compression.
- Frontend & CDN/Edge: Code split, tree shake, lazy load. Configure edge caching (CloudFlare/CloudFront), HTTP/2/3, Brotli compression, and WebP/AVIF images.
- Mobile & PWA: Implement service workers for offline functionality. Adaptive loading for slow networks. Virtual scrolling for long lists.
- Load Testing & Validation: Design realistic load scenarios using k6/Gatling to test normal, peak, and stress levels before deploying optimizations.
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