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.

Stanislav Khromov

titanas

Instant Articles for WordPress will let you configure DNS prefetching URLs and will automatically prerender the last 2 posts on the front page, plus next and previous posts when viewing a single post. You also have the option to pre-render sticky posts.
It is not recommended to use more than 4-5 URLs for DNS prefetching.
Enabling page prerendering will likely increase server and client (browsers) load.
Enabling subresources will let you specify URL’s to hint the web browser for high priority files, likes .JS or .CSS, for fetching these even before they appear in the HTML document.
Visit the Instant Articles homepage for more info: http://wpinstant.io/
Usage
Basic usage
Install plugin, go to the WP Admin > Instant Articles screen and enable the features you want.
<h3>Requirements</h3>
<ul>
<li>PHP version 5.2.4 or greater</li>
</ul>
<h3>Translations</h3>
<ul>
<li>None</li>
</ul>

WordPress Instant Articles

WordPress Instant Articles dramatically improves user experience and site speed with page pre-render, DNS prefetch, Link Prefetch, HTML5 subresource

wuk.ch DNS-Prefetch / Prerender vs WordPress Instant Articles