Claude Code
performance
Dependency Adding 500KB to Bundle Size
A small feature was added via npm package but bundle size increased 500KB. The feature doesn't justify the size increase. Build tools show the dependency is being included but it's rarely used, or lighter alternatives exist.
Adding the dependency solved a problem but created a new one: application loads slower for all users.
Error Messages You Might See
Bundle size warning: 500KB increase
Application load time increased significantly
Entry bundle larger than expected
Common Causes
- Package includes entire library when only one function is needed
- No tree-shaking configuration, entire package included despite partial use
- Dependency has heavy transitive dependencies (dependencies of dependencies)
- Duplicate dependencies at different versions in node_modules
- Development dependency accidentally included in production bundle
How to Fix It
Analyze bundle: webpack-bundle-analyzer, source-map-explorer show what takes space. Check package sizes on bundlephobia.com. Look for lighter alternatives. Use only needed exports: import { func } from 'lib' not import lib. Ensure devDependencies aren't bundled. Deduplicate: npm dedupe. Lazy load heavy dependencies.
Real developers can help you.
Matthew Jordan
I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
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.
Alvin Voo
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I'm a Senior Android developer, open to work in various fields
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
Matthew Butler
Systems Development Engineer @ Amazon Web Services
Franck Plazanet
I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth.
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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.
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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)
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 to analyze what's in the bundle?
Use webpack-bundle-analyzer (webpack-bundle-analyzer plugin) or source-map-explorer. Visualizes what takes space.
Should all dependencies be in package.json?
devDependencies for build tools, testing. dependencies for runtime. Never mix them.
How to reduce dependency size?
Use lighter alternatives (lodash-es instead of lodash). Lazy load: const lib = () => import('heavy-lib'). Tree-shake unused code.