Why Lovable Apps are SLOW! (Easy Fix)

Описание: Is your app feeling sluggish? In this video, I'll show you how to fix the most common performance issues in your Lovable application - from lazy loading images to implementing virtual scrolling like the pros at Facebook and Instagram do.

Learn how to use browser DevTools to diagnose performance problems and let AI help you optimize your code for lightning-fast load times.

📚 CHAPTERS:
0:00 - Intro: Is your app slow?
0:12 - Diagnosing performance issues with DevTools
1:04 - The problem: Loading all images at once
1:25 - Fix #1: Implementing lazy loading
2:20 - Why lazy loading still might not work
4:05 - Using Chat Mode to analyze code issues
4:54 - Fix #2: Adding width & height attributes for proper lazy loading
6:14 - Testing the improved lazy loading
7:20 - Fix #3: Avoiding unnecessary re-renders & memory leaks
9:04 - Understanding memory leaks in React (useState/useEffect)
10:04 - Cleaning up event listeners
11:01 - The easiest prompt: "Look for memory leaks"
12:00 - Verifying lazy loading is working
13:03 - The DOM problem: Too many elements on the page
14:00 - Fix #4: Virtual scrolling (the "bridge" concept)
15:08 - How virtual scrolling works in the DOM
16:06 - Troubleshooting flashy/janky virtual scroll
17:00 - Memory leaks with scroll observers (AI's Achilles heel)
18:24 - Debugging masonry + virtual scrolling conflicts
20:00 - Why virtual scrolling matters at scale
22:15 - Fixing row-based loading vs column-based (masonry grids)
25:00 - Adjusting virtualizer for responsive breakpoints
26:00 - Final result: Smooth skeleton loaders & dynamic loading
27:00 - How the DOM updates in real-time (adding/removing elements)
28:30 - Memory efficiency & avoiding leaks in production
29:00 - Wrap up & final tips

🔑 KEY TAKEAWAYS:
1. Lazy Loading: Add loading="lazy" to images, BUT also include width and height attributes so the browser knows layout positions

2. Memory Leaks: Always ask AI to check for memory leaks, especially when using scroll events, useEffect, or useState

3. Virtual Scrolling: Only keep a limited number of items in the DOM at once — add/remove as the user scrolls (like building a bridge while walking on it)

4. Clean Up Events: Always clean up scroll listeners and observers to prevent recursive memory issues

5. Use Chat Mode: When unsure about performance issues, use Lovable's chat mode to analyze your code


🔥 PRO TIPS:
If your app makes your camera lag or browser slow down, you probably have a memory leak
Test performance by reloading the page and watching the Network tab
Virtual scrolling is essential for social media-style apps (Instagram, TikTok, LinkedIn, etc.)
AI is great at building features but notorious for creating memory leaks — always double-check

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