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.

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.

Why is my database making so many requests?

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.

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 Lovable website slow?

Q: 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.

Q: 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.

Last checked 31 Aug 2026

Short answer

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.

Diagnose before optimising

Run a Lighthouse report (Chrome DevTools → Lighthouse, or PageSpeed Insights) and check the Network tab for what's actually large or slow. Guessing wastes prompts; a report tells you the real bottleneck.

Common causes in Lovable apps

Unoptimised images — large PNG/JPEG files served at full resolution instead of compressed, sized, and lazy-loaded.
Over-fetching data — a page pulling every row/column from a table when only a few are needed, or fetching on every render instead of once.
No code-splitting — a large app bundled into one JavaScript file that has to load before anything renders.
Excessive re-renders — a component re-rendering unnecessarily due to state or effect logic, especially as features accumulate.
Third-party scripts (analytics, chat widgets) loaded blocking rather than deferred.

How to fix it with Lovable

Run a performance check on this project. Look for large images, unnecessary re-fetching of data, and unused JavaScript, and suggest the highest-impact fixes first.

Then apply fixes incrementally and re-run Lighthouse after each one to confirm it actually helped.

What usually goes wrong

Fixing things that don't matter (micro-optimising a small component) while a 4MB hero image is the actual problem.
Not re-measuring after a fix — assuming it worked instead of confirming with another Lighthouse run.
Treating this as a one-off task instead of a habit — performance tends to degrade gradually as features are added (see the related question on that).

See /questions/how-do-i-speed-up-a-lovable-website and /questions/how-do-i-improve-lighthouse-scores for concrete fixes, and /troubleshooting for the general workflow.

Sources

Test and verify your app

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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.