Website loading speed on modx revo 3

Hello. Guys, tell me what to do to improve productivity. Performed the following:
1.CSS and JS minification
2.HTML minification:
$output = &$modx->resource->_output;
$output = preg_replace(‘|\s+|’, ’ ', $output);
$modx->resource->set(‘content’, $output);
3. thumb
4.WEBM CONVERTER Webp конвертер, плагин для MODX Revolution
5.Lazy Loading
8. Part of the external JS uploaded to the site
9. Maybe I did something else, but I don’t remember
Performance is low
I haven’t been able to solve the problem for a long time. On 2.8.4 everything was super up to 80% performance