Inline Critical CSS From Your Theme
Prints the contents of a critical.css file from your active theme folder directly in the page head, so above-the-fold content is styled before the main stylesheet finishes loading.
Snippet Library
Performance snippets for WordPress
Snippets that make WordPress lighter and faster: remove emoji scripts and embeds, control the Heartbeat API, limit revisions and load scripts only where they are needed. For developers and site owners chasing better Core Web Vitals.