Find the bottleneck
Use browser performance tooling and repeatable page tests to isolate server response, LCP resource priority, critical CSS, JavaScript, and above-the-fold media. Test the actual slow template, not only the homepage.
When field data is available, use it to confirm whether the lab problem is common for real visitors.
Fix the highest-leverage layer first
Server and cache problems should be fixed before micro-optimizing bytes. After that, prioritize work that removes blocking or unnecessary browser effort.
See the current product details and offer directly from WP Rocket.
View WP Rocket →WordPress-specific checks
Temporarily disable or isolate heavy third-party features in a staging environment, inspect plugin/theme assets, and confirm that caching or optimization exclusions are not forcing unnecessary work.
After each material change, test both performance and functionality.
Where WP Rocket can fit
WP Rocket combines page caching with CSS, JavaScript, media, preload, and related optimization controls. Use only the settings that address the measured problem, and add exclusions when a functional component requires them.