Slow Initial Page Load and Time to Interactive
App takes 5+ seconds to load initial page. Blank white screen for extended period. Users see slow Time to First Contentful Paint (FCP) and Time to Interactive (TTI). Performance metrics are poor.
Page load speed depends on bundle size, network latency, and resource blocking. Optimizations include code splitting, lazy loading, and resource prioritization.
Common Causes
- Large JavaScript bundle (>500KB) not split
- Loading all npm packages upfront instead of lazy loading
- Large images or unoptimized assets
- Synchronous scripts blocking HTML parsing
- Missing gzip compression on assets
How to Fix It
Analyze bundle in Vite:
npm run build -- --visualizerCode split with React.lazy():
const Dashboard = lazy(() => import('./Dashboard'));
Use Lighthouse DevTools to identify bottlenecks.
Real developers can help you.
Vlad Temian
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PawelPloszaj
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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.
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
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Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
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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
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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 FCP time?
Under 1.8 seconds is good. Measure with Lighthouse. Aim for <3 seconds for Time to Interactive.
How do I reduce bundle size?
Use dynamic imports for routes, lazy load heavy libraries, remove unused dependencies, use tree-shaking.