profile-browsing - Browse Performance Profiling Tool
Profile app performance while browsing, collecting Web Vitals and React rerender data via react-scan
Tags
Updated: 2026-03-26Capabilities
Typical Inputs
Typical Outputs
What this skill does
- profile browsing performance
- collect Web Vitals
- capture navigation timing
- detect long tasks
- measure layout shifts
- calculate LCP
- count React commits
- detect render bursts
- collect component data
- spawn profiler subagents
- merge profiler results
- generate performance report
- cleanup profiling sessions
Inputs
- dev server URL
- route batches
- playwright-cli
- react-scan configuration
- profiler subagent definition
Outputs
- performance issues list
- per-view summary table
- react-scan component data
- scroll jank metrics
- trace.zip file
Requirements
- dev server running
- playwright-cli installed
- react-scan configured