Lovable·Fixperformancebeginner

My Lovable App Is Slow

Quick Answer

Lovable apps often load all JavaScript upfront instead of splitting it by route. Images are also frequently unoptimized — large files loaded without compression. Start with "Tell Lovable to fix performance" before making broader code changes.

You're in the right place if...

!Pages take 3-5 seconds to load
!Users see blank white screen briefly
!Core Web Vitals failing in Google Search Console

Why this happens

Lovable apps often load all JavaScript upfront instead of splitting it by route. Images are also frequently unoptimized — large files loaded without compression.

Fix

Tell Lovable to fix performance

Open Lovable and paste this prompt. It addresses the three biggest performance killers at once.

Copy this prompt

My app is loading slowly. Please:
1. Add lazy loading to all images
2. Add loading="lazy" to all img tags
3. Split the JavaScript bundle by route using dynamic imports
4. Add next/image optimization to all images
Optimize for Core Web Vitals.

Check image sizes

Go to your deployed app, right-click any image, click Inspect, go to the Network tab, and reload the page. If any image is over 200KB, it needs compression.

Compress images

Tell Lovable to convert images to modern formats:

Copy this prompt

Convert all images to WebP format and add width/height attributes to prevent layout shift (CLS).

Prevent this next time

Always use next/image instead of plain img tags. Tell Lovable this in your founding prompt: 'Use next/image for all images optimized for Core Web Vitals.'