Plugins on the list:

Autoptimize speeds up your website by optimizing JS, CSS, images (incl. lazy-load), HTML and Google Fonts, asyncing JS, removing emoji cruft and more.

Categories: General

Allows you to easily manage the frequency of the WordPress heartbeat API.

Categories: General

Async Javascript lets you add 'async' or 'defer' attribute to scripts to exclude to help increase the performance of your WordPres …

Categories: General