Does it work with React or other frameworks?

Absolutely. It includes patterns for identifying unnecessary re-renders in React and using modern APIs like useTransition or Web Workers to keep the main thread free.

How does this skill help with Core Web Vitals?

It provides specific strategies to diagnose and improve LCP, INP, and CLS by analyzing network payloads, main-thread activity, and unexpected layout shifts.

Why use this skill instead of just opening DevTools?

This skill provides an expert layer of interpretation, helping you navigate overwhelming flame graph data and prioritize the most impactful performance fixes based on real-world metrics.

Can it detect memory leaks in JavaScript?

Yes, it guides you through taking heap snapshots and identifying detached DOM nodes or event listeners that aren't being properly cleaned up.

What is layout thrashing and how is it fixed?

Layout thrashing occurs when JavaScript reads and writes to the DOM in a way that forces the browser to recalculate styles repeatedly; this skill helps you batch these operations to improve FPS.

Browser Runtime Performance Profiling

Name: Browser Runtime Performance Profiling
Author: Agentient

byAgentient

0•

Analytics & Monitoring

Diagnoses and optimizes web application performance using Chrome DevTools, Core Web Vitals, and memory profiling.

This skill transforms Claude into a performance engineering expert, capable of guiding developers through the intricacies of the Chrome DevTools Performance panel. It provides systematic methodologies for recording profiles, interpreting complex flame charts, and identifying the root causes of 'jank' such as long tasks, layout thrashing, and expensive JavaScript execution. Beyond execution speed, the skill offers deep dives into Core Web Vitals (LCP, INP, CLS) and memory management, helping you eliminate memory leaks and ensure your web applications remain responsive and smooth on any device.

Key Features

01Comprehensive Core Web Vitals optimization for LCP, INP, and CLS

02Advanced memory profiling using heap snapshots and detached DOM node analysis

03Actionable Lighthouse audit interpretation and implementation strategies

040 GitHub stars

05Expert flame chart analysis to pinpoint long tasks and main-thread bottlenecks

06Detailed layout thrashing detection to prevent forced synchronous reflows

Use Cases

01Identifying and fixing memory leaks that cause performance degradation over time

02Improving SEO and user experience by meeting Core Web Vitals 'Good' thresholds

03Debugging UI stuttering and interaction delays in complex frontend applications

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add agentient/vibekit browser-runtime-performance-profiling

For use in Claude.ai and ChatGPT

Download Skill