Perform is a web performance optimization plugin for WordPress.
It is the free and lightweight plugin which will help you improve the loading speed of your WordPress site by just a few clicks.
It will help you disable unused default functionality of WordPress which will bloat your WordPress site.
Additionally, you can remove all the unnecessary assets i.e. JS and CSS on any of the specific page/post of your WordPress site with just few clicks. Doing this will help you reduce the HTTP requests and load off from your WordPress site.