Check unused theme js and css


How can I check which Js and CSS are unused that comes in with my theme files?
Any tool or plugin to check? I reached to my theme developer and he gave me this option to lighten my theme even further and speed up my site

I am not sure what I am using and what I am not, reducing js and css can improve ttfb i guess as it optimizes even better.
There are over 40 options to improve but i am unsure what to do

  • Please check Theme Documentation, read its feature.

  • Disable only those part which you are personally aware that not using it.