webpagetest
Installation
SKILL.md
Analyze performance with WebPageTest
WebPageTest reveals real-world performance issues that synthetic tools miss—like TTFB from actual locations, render-blocking patterns, and third-party script impact.
Quick Reference
- Run 3+ tests to get consistent results
- Test from locations near your users
- Use filmstrip view to identify visual progress
- Check waterfall for blocking resources and slow third-parties
Check
Use WebPageTest to analyze page performance, identify bottlenecks, and measure real-world loading metrics across different devices and connections.
Fix
Implement recommended optimizations from WebPageTest results including resource compression, caching, and critical path improvements.