Large Bundle Size - App Loads Slowly
Your JavaScript bundle is very large (over 500KB), making the app slow to load. First Contentful Paint takes several seconds even on good connections.
Users on slow networks experience long loading times.
Error Messages You Might See
Common Causes
- Importing entire library when only small part needed
- Large image assets embedded in bundle instead of loaded separately
- Unused code not being tree-shaken by build tool
- Moment.js or similar heavy date libraries (use date-fns, dayjs instead)
- Loading all routes upfront instead of code splitting by route
How to Fix It
Use tree-shakeable imports: import { map } from 'lodash-es' not import lodash
Lazy load heavy components: const Component = dynamic(() => import('@/components/Heavy'))
Replace heavy libraries: moment.js -> date-fns or dayjs, @apollo/client -> urql
Optimize images: use next/image, convert to WebP, serve appropriate sizes
Enable code splitting in Next.js config (automatic for routes)
Real developers can help you.
BurnHavoc
Been around fixing other peoples code for 20 years.
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
Victor Denisov
Developer
Nam Tran
10 years as fullstack developer
Yovel Cohen
I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
PawelPloszaj
I'm fronted developer with 10+ years of experience with big projects. I have small backend background too
Alvin Voo
I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream.
What I bring to your project:
Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causes—like significantly reducing memory usage by optimizing complex DB joins.
Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams.
Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.
rayush33
JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems
legrab
I'll fill this later
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
What's a good target bundle size?
JavaScript: <200KB. With gzip: <50KB. For comparison, heavy frameworks are ~200KB
How do I check actual bundle size?
npm run build shows Next.js Size. Use webpack-bundle-analyzer for detailed breakdown
What about image sizes?
Use next/image for automatic optimization. Aim for <100KB total images, <30KB per image