Our main interest to move to 4.x is speed.
However, the migrated site has even worse results on pagespeed.
Can you check why?
This reply has been marked as private.
Hi please enable the service worker and then test the speed second time . We have wp rocket with which the speed works fine :
https://www.youtube.com/watch?v=3IRNZDGBcDQ
please also enable the service worker from wp-admin -> vibebp -> settings : https://docs.wplms.io/admin-guide-faqs#pwa-plus-icon-does-not-appear
Secondly please goto wp-admin -> wplms -> miscellaneous -> BootStrap 4 & Offload scripts -> no jqeury mode .