GTmetrix

<p>GTmetrix has created GTmetrix for WordPress – a WordPress plugin that actively keeps track of your WP install and sends you alerts if your site falls below certain criteria.</p>
<p>Run analyses, schedule reports on a daily, weekly or monthly basis, and receive alerts about the status of your site all from within your WordPress Admin!</p>


GTmetrix for WordPress

Plugin isn't showing the toolbar link in the latest version of WP now :(

Fantastic plugin but...

GTmetrix can help you develop a faster, more efficient, and all-around improved website experience for your users. Your users will love you for it.

Texiwill

<p>Improves Pagespeed/GTMetrix/SEMrush/Yslow scores for Twenty Fourteen and other themes by reducing round trips, moving core CSS above the fold. For best results, you should also employ the following to get the best score:</p>
<pre><code>Fast Velocity Minify
Smush IT
Declutter WordPress
</code></pre>
<h4>Features</h4>
<pre><code>    - removes excessive fonts:
            Lato (from google)
            Open Sans (from google - part of WP Embed load)
        For Emphasize theme
            Genericons (replace with Font Awesome if in use)
- removes excessive json+ld entries
    - Embedding Styles Above-the-fold:
    Child Theme Configurator (child theme styles)
            Twentyfourteen Styles (and main theme styles for other themes)
    Icon-Fonts when Font Awesome in use
    Font Awesome Four Menus (overrides Icon-Fonts font-awesome)
    Fourteen Colors
            WP Bootstrap Tabs
    Tabby Responsive Tab
            Simple Custom CSS
    WP-Columna
    Responsive Lightbox Fancybox
    Fancier Author Box
- removes H1 collisions
- removed W3 Total Cache comments at end of post
    W3 Total Cache adds a comment with whitespace that takes 
    lots of processing
- removed Child Theme Configurator's parent theme
    older setup, new setup not yet.
</code></pre>
<h3>Usage</h3>
<p>Works best with BWP-Minify and Defer CSS AddOn for BWP Minify already installed, however, this is a plugin with no settings. It just works.</p>


AAC Scoring

Improves Pagespeed/GTMetrix/SEMrush/Yslow scores for Twenty Fourteen and other themes by reducing round trips, moving core CSS above the fold.

GTmetrix for WordPress vs AAC Scoring