🚀 Performance Optimization Guide for Odoo Expertos

⚠️ Important: These optimizations are designed to improve performance WITHOUT breaking existing pages.

Current Performance Issues (PageSpeed Score: 63/100)

❌ Largest Contentful Paint: 9.4s (should be < 2.5s)
❌ Render-blocking resources: 1,270ms delay
❌ No HTTP caching headers
❌ Large unoptimized images (12MB from Pexels)
❌ D3.js loaded synchronously (1,380ms delay)

Quick Win #1: Use Optimized Server (Immediate Impact)

        
# Stop current server (Ctrl+C)

# Start optimized server with caching:

node server-optimized.js

✅ Adds HTTP caching headers
✅ Enables ETags for efficient revalidation
✅ Sets proper cache durations by file type
✅ No code changes needed

Quick Win #2: Add Performance Script to Homepage

Add this single line to your index.html before the closing </body> tag:

<script src="/performance-optimizer.js" defer></script>

✅ Adds lazy loading for images
✅ Defers D3.js loading
✅ Implements browser caching
✅ Preloads critical resources

Quick Win #3: Optimize Images (Manual but Effective)

For images currently loading from Pexels, modify your HTML:

        
<!-- Before (slow) -->

<img src="https://images.pexels.com/photos/1181406/pexels-photo-1181406.jpeg" alt="...">

<!-- After (fast with lazy loading) -->

<img class="lazy-bg" data-src="https://images.pexels.com/photos/1181406/pexels-photo-1181406.jpeg?auto=compress&cs=tinysrgb&w=800" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 800 600'%3E%3C/svg%3E" alt="..." loading="lazy">

Note: Adding ?auto=compress&cs=tinysrgb&w=800 reduces image size by ~70%

Quick Win #4: Defer Component Loading

Replace synchronous component loading in your HTML:

        
<!-- Before (blocks rendering) -->

<script src="/components/header.js"></script>

<script>document.write(createHeader());</script>

<!-- After (non-blocking) -->

<div id="header-placeholder"></div>

<script>

    (function() {

        var s = document.createElement('script');

        s.src = '/components/header.js';

        s.async = true;

        s.onload = function() {

            document.getElementById('header-placeholder').innerHTML = createHeader();

        };

        document.head.appendChild(s);

    })();

</script>

Verification: Check Cache Status

Your Redis/Upstash cache API is configured but not being used. To verify it's working:

        
# Test cache API (in browser console):

fetch('/api/cache?action=stats')

  .then(r => r.json())

  .then(console.log);

# Expected response:

{ success: true, stats: { keys: X, connected: true } }

Expected Performance Improvements

✅ LCP: 9.4s → ~3.5s (63% improvement)
✅ FCP: 2.2s → ~1.2s (45% improvement)
✅ Page Load: 12MB → ~4MB (67% reduction)
✅ PageSpeed Score: 63 → ~85+ (35% improvement)

Testing the Optimizations

Start the optimized server: node server-optimized.js
Open Chrome DevTools → Network tab
Look for "from disk cache" or "304 Not Modified" on reload
Check Performance tab for improved metrics
Run PageSpeed Insights again after changes

💡 Pro Tip: Start with the optimized server (Quick Win #1) - it requires no code changes and provides immediate benefits!

Optional: Install Compression

        
npm install compression

# Then uncomment lines in server-optimized.js:

const compression = require('compression');

app.use(compression());

This will add gzip compression, reducing transfer sizes by ~70% for text files.