When should I use useTransition instead of regular state updates?

Use useTransition for non-urgent updates like filtering lists or switching tabs. This allows React to prioritize urgent updates like typing or clicking, keeping the UI responsive.

What is the difference between useTransition and useDeferredValue?

useTransition is used to wrap the code that performs the state update, while useDeferredValue is used to wrap the resulting value itself to defer rendering of dependent components.

Why is referential equality important for React performance?

React.memo and hooks like useMemo rely on shallow comparisons. If you pass a new object or function reference on every render, memoization will fail and cause unnecessary re-renders.

Does useMemo always make my React app faster?

No, useMemo has its own memory and computation overhead. It should only be applied to truly expensive calculations that you've confirmed are bottlenecks through profiling.

React Concurrency & Memoization

Name: React Concurrency & Memoization
Author: Agentient

byAgentient

Design Tools

Optimizes React application performance using modern concurrent rendering features and strategic memoization patterns.

About

This skill empowers developers to master the React 18+ performance paradigm, shifting from blocking synchronous rendering to interruptible concurrent UI updates. It provides specific implementation patterns for leveraging useTransition and useDeferredValue to keep interfaces responsive during heavy computations, alongside a rigorous framework for applying memoization techniques. By focusing on profile-driven optimization, the skill helps identify when to use useMemo, useCallback, and React.memo to prevent unnecessary re-renders while avoiding the overhead of premature optimization and common referential equality pitfalls.

Key Features

Implementation of React 18 concurrent rendering and transition updates
Detection and correction of common performance anti-patterns
Deferred value strategies for non-urgent background rendering
Profile-driven memoization using useMemo and useCallback hooks
Component-level optimization with React.memo and custom comparators
0 GitHub stars

Use Cases

Maintaining input responsiveness during expensive live search or filtering operations
Optimizing data-heavy dashboards with complex visualizations and charts
Managing smooth state transitions in large-scale navigation and tab systems

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add agentient/vibekit react-concurrency-and-memoization

For use in Claude.ai and ChatGPT

Download Skill

GitHub