Magento 2 Performance Optimization

Before writing code

Fetch live docs:

1. Web-search site:experienceleague.adobe.com commerce performance for performance best practices
2. Web-search site:experienceleague.adobe.com commerce configuration cache for cache configuration
3. Web-search site:developer.adobe.com commerce php development cache for cache development guide

Full Page Cache (FPC)

Varnish (Recommended for Production)

• Serves cached pages from RAM before hitting the web server
• Dramatically reduces TTFB (time to first byte)
• Magento generates VCL (Varnish Configuration Language) files
• Configure at Stores > Configuration > Advanced > System > Full Page Cache
• Generate VCL: bin/magento varnish:vcl:generate