Performance Profiler

Find real bottlenecks and apply targeted fixes that move measured metrics.

When to Use This Skill

Use this skill when the user asks to:

• Improve LCP, INP, CLS, or TBT
• Run Lighthouse and interpret results
• Reduce JS/CSS payload size
• Profile backend CPU, memory, or query latency
• Set and enforce performance budgets in CI

Workflow

Step 1: Measure first