Remove unused elements from theandincluding the following link tags: Really Simple Discovery (RSD), Windows Live Writer, REST API, Posts/Pages Shortlink, Post’s Relational, WordPress Generators (also good for security), RSS Feed Links. Valid HTML comments are also stripped (exceptions can be added) while conditional Internet Explorer comments are preserved.
Site-Wide Unload For Common Elements that are often unused such as: WordPress Emojis, jQuery Migrate, Comment Reply (if not using WP as a blog)
Disable XML-RPC Protocol Support partially or completely
Inline CSS Files * Read more
Defer CSS loaded in theto reduce render-blocking resources