JavaScript Bundle Size Exceeds Vercel Limit
Your Next.js application has excessive JavaScript bundle size, causing slow page loads, poor Core Web Vitals scores, and potential Vercel function timeout issues. Build analysis shows bloated chunks.
Bundle size grows from unused dependencies, large libraries, lack of code splitting, or importing entire libraries instead of specific utilities.
Error Messages You Might See
Common Causes
- Importing entire libraries (lodash, date-fns) instead of specific functions
- Heavy dependencies without tree-shaking: moment.js, jQuery, momentjs alternatives
- Dynamic imports not configured, causing all routes bundled together
- Node modules accidentally included in client bundle
- No lazy loading for heavy components (charts, editors, maps)
How to Fix It
Analyze bundle: Use npm run build then npx next/bundle-analyzer to see what's bloating bundle.
Replace heavy libs: Swap moment.js for date-fns or dayjs, lodash for lodash-es with tree-shaking.
Lazy load components: Use dynamic imports for heavy components:const Chart = dynamic(() => import('@/components/Chart'), { ssr: false })
Check imports: Replace import _ from 'lodash' with import pick from 'lodash/pick'
Real developers can help you.
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.
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
Matt Butler
Software Engineer @ AWS
prajwalfullstack
Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help
Omar Faruk
As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience.
My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture.
I played a key role in creating a scalable and maintainable platform to support educators and learners globally.
I'm enthusiastic about embracing new challenges and making meaningful contributions.
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
BurnHavoc
Been around fixing other peoples code for 20 years.
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 big should my JavaScript bundle be?
Aim for <100KB main bundle. First-party code usually <50KB, dependencies <50KB. Use bundle analyzer to identify large packages.
What's the fastest way to reduce bundle?
Replace moment.js (67KB) with date-fns (13KB). Remove unused dependencies. Lazy load below-fold components.
How do I enable tree-shaking?
Ensure package.json has 'sideEffects': false. Use ES modules for imports. Webpack automatically tree-shakes unused code.