Performance Profiling
A structured mental model for performance work that emphasizes measure-first discipline. You get a clear four-step workflow (baseline, identify, fix, validate), Core Web Vitals targets with actual thresholds, and decision tables for picking the right profiling tool based on symptoms. The bundle analysis and runtime profiling sections are especially practical, showing you what patterns to look for and what actions to take. It includes a Lighthouse audit script you can run immediately. The anti-patterns section is refreshingly honest: profile before guessing, fix the biggest issue first, don't optimize prematurely. Best used when you need to stop guessing and start measuring systematically.
- skills.sh installs
- 893
- GitHub stars
- 43.1K
- last updated
- Jul 14, 2026
Install
$ npx -y skills add sickn33/antigravity-awesome-skills --skill performance-profiling --agent claude-codeInstalls into .claude/skills of the current project.
Files
Performance Profiling
Measure, analyze, optimize - in that order.
🔧 Runtime Scripts
Inspect this bundled helper as code before use and run only against an authorized URL. Lighthouse launches a browser and can load third-party resources; lab scores do not establish field Core Web Vitals. The helper reports command/JSON failures and unavailable scores separately; inspect the returned error and do not treat an unavailable category as a zero score.
| Script | Purpose | Usage |
|---|---|---|
scripts/lighthouse_audit.py | Lighthouse performance audit | python scripts/lighthouse_audit.py https://example.com |
1. Core Web Vitals
Targets
| Metric | Good | Poor | Measures |
|---|---|---|---|
| LCP | < 2.5s | > 4.0s | Loading |
| INP | < 200ms | > 500ms | Interactivity |
| CLS | < 0.1 | > 0.25 | Stability |
When to Measure
| Stage | Tool |
|---|---|
| Development | Local Lighthouse |
| CI/CD | Lighthouse CI |
| Production | RUM (Real User Monitoring) |
2. Profiling Workflow
The 4-Step Process
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- Repository
- github.com/sickn33/antigravity-awesome-skills
- Category
- Debugging
- First seen
- Apr 16, 2026
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