Why is my Lovable website slow?

Slowness is usually caused by large unoptimised images, too much data fetched at once, or heavy client-side rendering — profile it with Lighthouse/DevTools before asking Lovable to fix anything.

How do I speed up a Lovable website?

Compress and lazy-load images, fetch only the data each page needs, remove unused dependencies, and ask Lovable to run a performance/codebase audit to find the highest-impact fixes.

How do I improve Lighthouse scores?

Run Lighthouse to find your worst-scoring category, fix the top 2-3 flagged issues (usually images, unused JavaScript, or render-blocking resources), and re-run it to confirm before moving on.

How do I improve Core Web Vitals?

Focus on the three metrics Google measures — LCP (loading), INP (interactivity), and CLS (visual stability) — and fix the specific one flagged as poor, usually starting with images for LCP.

How do I improve LCP?

Largest Contentful Paint is almost always slowed by an oversized hero image or a render-blocking resource — compress/preload the largest above-the-fold element and defer everything not needed for first paint.

Why are images loading slowly?

Images usually load slowly because they're uploaded at full camera/design resolution, in an uncompressed format, and without lazy-loading or a CDN — the fix is compression, correct sizing, and modern formats.

How do I optimise images?

Resize images to their actual display size, compress them, convert to WebP/AVIF where practical, and lazy-load anything below the fold — ask Lovable to apply this across the project, not just one page.

How do I lazy-load images?

Ask Lovable to add native lazy-loading to images below the fold while keeping the hero/first-visible image loading eagerly, so visitors aren't downloading offscreen images before they're needed.

How do I reduce unnecessary database calls?

Fetch only what a page needs, cache results, batch requests, and let Postgres do filtering instead of pulling whole tables into the client.

Why is my dashboard slow?

Dashboards are usually slow because they run several unoptimised queries at once, re-render on every state change, or load large charts and images without lazy loading.

Why does my app become slow with more users?

Slowdowns under load usually mean missing database indexes, no rate limiting, or queries that scale linearly with row count instead of being paginated.

How do I find unnecessary React renders?

Use React DevTools' Profiler and the 'Highlight updates' setting to see which components re-render too often, then fix unstable props, missing memoisation, or state stored too high in the tree.

How do I remove unused code?

Ask Lovable to search for unused components, imports and dependencies, or run a tool like ts-prune/depcheck via the terminal, then remove what's confirmed unused and re-test.

How do I audit a Lovable project's performance?

Combine a browser Network/Performance trace, a React DevTools profile, and a query review of your Supabase schema — then ask Lovable to fix the specific issues found rather than 'optimise everything'.

Why is my database making so many requests?

Q: Why does my Lovable app get slower as I add features?

Each new feature can add its own data fetches, dependencies, and re-renders that compound over time — without periodic clean-up, an app accumulates weight even if each individual change seems small.

Last checked 31 Aug 2026

Short answer

Usually a component is re-fetching data on every render, a page is running the same query multiple times, or you're fetching entire tables instead of what's actually needed — ask Lovable to audit data-fetching patterns.

Common causes

Fetching in a loop or on every render instead of once, often from an effect that's missing the right dependency handling.
The same data fetched independently by multiple components on one page instead of fetched once and shared.
Fetching entire tables/columns when only a few fields are needed for the view.
No caching — every navigation back to a page re-runs the same query instead of reusing recent results.
Real-time subscriptions left open longer than needed, continuing to send updates for data no longer on screen.

How to check

Open DevTools → Network tab and watch requests as you use the app normally. Repeated identical requests, or a burst of requests on a single page load, point at the problem area.

Fixing it

Audit data fetching on [page/feature]. Find any queries that run more often than needed, fetch more data than the view uses, or duplicate what another component already fetched, and fix the highest-impact ones first.

Why this matters beyond speed

Excess database requests can also affect your Cloud usage allowance, since read/write volume is part of what counts against it — an inefficient page can quietly use more of your allowance than the feature justifies.

What usually goes wrong

Adding a new feature that fetches the same data another part of the page already has, because it was built in a separate chat session without checking what existed.
Selecting * (all columns) out of convenience when only two or three fields are displayed.
Leaving a real-time subscription running after a user navigates away from the page that needed it.

If usage keeps climbing despite fixes, ask Lovable to check Logs for which queries run most often, and tackle those first — see /questions/why-does-my-lovable-app-get-slower-as-i-add-features for the wider pattern.

Sources

Logs

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GuideHow to Improve Lovable Loading SpeedFind the actual cause of a slow project — images, queries, waterfalls or scripts — before changing anything.