performance-profiling

Audit web performance with Lighthouse and browser DevTools.

1|Updated Feb 6, 2026
One-click install
npx skills add https://github.com/Adam-Guerin/Asmblr --skill performance-profiling-adam-guerin
Or copy as Structured Prompt for Agentâ–¼
Please help me install this Agent Skill.
Skill: performance-profiling
Source: https://github.com/Adam-Guerin/Asmblr/tree/main/skills/performance-profiling
Command: npx skills add https://github.com/Adam-Guerin/Asmblr --skill performance-profiling-adam-guerin

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill addresses the challenge of slow-loading websites and unresponsive user interfaces by providing tools and methodologies for identifying and resolving performance bottlenecks.

Core Features & Use Cases

  • Performance Auditing: Utilizes Lighthouse to audit web pages against Core Web Vitals and other performance metrics.
  • Profiling Workflow Guidance: Outlines a structured 4-step process (Baseline, Identify, Fix, Validate) for performance optimization.
  • Bundle Analysis: Provides insights into JavaScript bundle size and composition to identify optimization opportunities.
  • Runtime & Memory Profiling: Guides users on analyzing browser DevTools for script execution and memory usage issues.
  • Use Case: A developer can use this skill to audit their website's performance, identify that large JavaScript bundles are causing slow load times, and then use the provided guidance to implement code splitting for better performance.

Quick Start

Run a Lighthouse performance audit on the provided URL.

Frequently Asked Questions about performance-profiling

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

FAQPage Schema
How do I identify what is causing slow web performance and unresponsive user interfaces?â–¼

To identify slow web performance, you can use this skill's structured profiling workflow to measure loading, interactivity, and stability bottlenecks using Lighthouse and browser DevTools. It guides you through auditing Core Web Vitals to pinpoint exact runtime execution and memory issues.

What is the best way to audit my website against Core Web Vitals?â–¼

The best way to audit Core Web Vitals is to run a Lighthouse performance audit on your URL. This skill provides a comprehensive framework to measure baseline metrics, identify bottlenecks in loading and stability, and validate optimizations after fixing them.

How do I profile JavaScript bundle size and runtime execution issues?â–¼

To profile JavaScript bundle size and runtime execution, this skill provides bundle analysis insights and browser DevTools guidance. It helps you identify large bundle compositions and detect script execution bottlenecks so you can implement techniques like code splitting.

Can I use this performance profiling workflow to find memory leaks in my web application?â–¼

Yes, you can use this performance profiling workflow to find memory leaks. It includes dedicated runtime and memory profiling guidance that directs you to analyze browser DevTools, helping you detect and resolve memory usage issues impacting interactivity.

What steps should I follow for effective web performance optimization?â–¼

For effective web performance optimization, you should follow the structured 4-step profiling process: Baseline, Identify, Fix, and Validate. This workflow ensures you measure initial metrics, locate bottlenecks, apply optimizations, and confirm the performance improvements.