Stefan M.

The Plugin implements 2 things:
DNS-Prefetch
It looks for all CSS and JS Files which are loaded from external webpages and implement a dns-prefetch header tag. 
This saves a lot of connection time on page load.
HTML5 Prefetch and Google Prerender
It makes a new table with small statistics and measures (internal) referal page to next page. 
With these statistics, the most clicked “next” page will be automatically added as prerender. Prerender opens with very small CPU load the “next” guessed page already as a hidden Tab in the client browser. If the client select this page, the page can instantly showed without delay. 
Tests have shown a pageload decrease of 68%.
Please note: The prerender needs some stats to work correctly. Don’t try to generate some statistic, wait few days / weeks and you have organic and true statistic.
If you have questions, please do not hesitate to contact us: <a href="http://wuk.ch/" title="web updates kmu GmbH" rel="nofollow ugc">wuk.ch</a>

wuk.ch DNS-Prefetch / Prerender

Adds dns-prefetch and prerender functionalities on WordPress for better PageSpeed.

Sam Perrow

This plugin allows users to automatically and easily embed resource hints to improve page load time.
DNS prefetch, prerender, preconnect, prefetch, and preload are all supported.
After installation, preconnect hints will automatically be created the next time your website is visited.
You have the choice to include these resource hints in the HTTP header or the website’s .
<h3>Installation Video</h3>
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/Aha9E3AXvJQ?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Pre* Party Resource Hints

Extremely effective, and by stealth, with automatic hints. My site speed score improved sharply. 

Great plugin

Take advantage of browser resource hints and plug-and-play features to improve page load time.

wuk.ch DNS-Prefetch / Prerender vs Pre* Party Resource Hints