Here are more specific test using Google PageSpeed Insights
Here are my settings:
- System - Page Cache: Enabled
- System Cache: ON Conservative Caching
Here are the tests:
---CASSIOPEA TEMPLATE without MODULES---
---CASSIOPEA TEMPLATE with MODULES---
---HELIX ULTIMATE TEMPLATE with MODULES---
CSS and JS Compress Off:
CSS Compress On + JS Compress Off:
- Desktop: Crashes Website
- Mobile: Crashes Website
CSS Compression Off + JS Compress On:
CSS and JS Compress On:
- Desktop: Crashes Website
- Mobile: Crashes Website
For me, turning on CSS Compression crashes my website.
Can you test your website using the default Joomla template?
For me, it appears that my low scores on are due to the modules on my homepage are not optimized for mobile.