Cursor
performance
React Components Rerendering Excessively
After Cursor refactored your React component code, components are re-rendering far too frequently, causing performance degradation and jank on the page.
Components that shouldn't re-render are being triggered by parent updates.
Error Messages You Might See
Component re-rendering too frequently
Lag on user input
High CPU usage
Janky scrolling
Common Causes
- Props or state objects recreated on every render (inline object/function creation)
- useCallback or useMemo removed to simplify code, eliminating optimization
- Parent passes new object reference every render even if contents identical
- Incorrect dependency arrays in useEffect (missing dependencies)
- Context consumer re-renders when context value changes (even unrelated)
How to Fix It
Use React DevTools Profiler to identify re-renders. Wrap components with React.memo() for prop comparison. Use useCallback/useMemo for functions/objects passed as props. Check dependency arrays. Split context if some parts change frequently.
Real developers can help you.
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals.
I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software.
Bastien Labelle
Full stack dev w/ 20+ years of experience
Matt Butler
Software Engineer @ AWS
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
BurnHavoc
Been around fixing other peoples code for 20 years.
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
hanson1014
Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround.
Dor Yaloz
SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
Supabase expert
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization.
I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems.
My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.**
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I find unnecessary re-renders?
React DevTools Profiler tab. Highlight updates shows which components re-rendered. Check props/state actually changed.
What's React.memo?
HOC that memoizes component. Re-renders only if props change (shallow comparison). Use for expensive components.