performance-audit

Diagnoses website performance bottlenecks via Chrome DevTools and Lighthouse metrics.

1|1|Updated Jun 15, 2026
One-click install
npx skills add https://github.com/damadorPL/performance-audit-skill-public --skill performance-audit-damadorpl
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: performance-audit
Source: https://github.com/damadorPL/performance-audit-skill-public/tree/main/skills/performance-audit
Command: npx skills add https://github.com/damadorPL/performance-audit-skill-public --skill performance-audit-damadorpl

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you diagnose why a website is slow by turning a URL into a structured performance audit with lab metrics, trace analysis, and prioritized fixes.

Core Features & Use Cases

  • Core Web Vitals analysis: Measure LCP, CLS, FCP, TTFB, and INP so you can identify user-visible loading and interaction problems.
  • Trace and Lighthouse review: Capture a Chrome performance trace, run Lighthouse, and inspect render-blocking requests, long tasks, third-party impact, and cache behavior.
  • Delivery and hygiene checks: Detect oversized images, missing preconnects, uncompressed text assets, HTTP/1.1 bottlenecks, and forced reflow hotspots.
  • Use Case: A product or engineering team can audit a marketing page or app route, then use the report to fix the biggest causes of slow load and poor interactivity.

Quick Start

Ask the performance audit skill to analyze this URL on desktop with default throttling and return a prioritized report.

Frequently Asked Questions about performance-audit

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I diagnose website performance bottlenecks from a URL?

To diagnose website performance bottlenecks from a URL, you need a structured audit that captures a Chrome DevTools performance trace, runs Lighthouse, and extracts Core Web Vitals metrics like LCP and CLS to identify slow loading causes.

What Core Web Vitals should I check to find page speed issues?

You should check the Core Web Vitals LCP, CLS, FCP, TTFB, and INP to find page speed issues. Measuring these metrics identifies user-visible loading delays, layout shifts, and interaction problems on web pages and application routes.

Can I use a Lighthouse audit to detect render-blocking requests and third-party impact?

Yes, you can use a Lighthouse audit to detect render-blocking requests and third-party impact. A performance audit reviews trace data and Lighthouse reports to inspect long tasks, third-party scripts, and cache behavior that delay page rendering.

How do I inspect Chrome DevTools traces for forced reflow and oversized images?

You inspect Chrome DevTools traces for forced reflow and oversized images by running a delivery and hygiene check. This process analyzes performance traces to detect uncompressed text assets, missing preconnects, and HTTP/1.1 bottlenecks.

Does a Core Web Vitals analysis work for both marketing sites and application routes?

Yes, a Core Web Vitals analysis works for both marketing sites and application routes. The audit applies to any web page requiring performance tracing, request-chain inspection, and third-party impact review to improve loading and interactivity.

What is the best way to get prioritized remediation guidance for slow loading pages?

The best way to get prioritized remediation guidance for slow loading pages is to run a performance audit. It combines lab metrics, trace analysis, and Lighthouse data to produce a report highlighting the biggest causes of poor load and interactivity.