jp2112

Disqus is a third-party comment management system. However it loads its javascript code on every page indiscriminately. This code should only be loaded on pages where the comments form is actually going to load. Otherwise your site is wasting cycles including javascript that isn’t going to be used.
This plugin stops the <a href="https://wordpress.org/plugins/disqus-comment-system/" rel="ugc">Disqus plugin</a> from loading its javascript on pages or posts where comments are closed. If comments are closed and there are no existing comments already, the JavaScript will be stopped from loading. Note that to avoid breaking the existing functionality, the JavaScript will still load if comments are closed but there are already some comments on a page/post.
Based on http://thomasgriffinmedia.com/blog/2012/11/tame-disqus-comments-in-wordpress/
Disclaimer: This plugin is not affiliated with or endorsed by Disqus.
<h3>If you need help with this plugin</h3>
If this plugin breaks your site or just flat out does not work, please go to <a href="https://wordpress.org/plugins/disqus-conditional-js-load/#compatibility" rel="ugc">Compatibility</a> and click “Broken” after verifying your WordPress version and the version of the plugin you are using.
Then, create a thread in the <a href="https://wordpress.org/support/plugin/disqus-conditional-js-load" rel="ugc">Support</a> forum with a description of the issue. Make sure you are using the latest version of WordPress and the plugin before reporting issues, to be sure that the issue is with the current version and not with an older version where the issue may have already been fixed.
Please do not use the <a href="https://wordpress.org/support/view/plugin-reviews/disqus-conditional-js-load" rel="ugc">Reviews</a> section to report issues or request new features.

Disqus Conditional JS Load

Stop the loading of Disqus Javascript on pages/posts where comments are closed or not available.

With this plugin you can easily replace the standard WordPress commenting form with one of the popular commenting system’s widget, such as <a href="https://disqus.com/" rel="nofollow ugc">Disqus</a> and <a href="https://www.hypercomments.com/" rel="nofollow ugc">HyperComments</a> or with the VKontakte comments widget.
<h4>Working with plugin</h4>
<ul>
<li>After installation you should go to the plugin settings page in the Comments section and paste the comments widget into a single form field and then click Save Changes.</li>
<li>To get the widget code you will need to register at the appropriate commenting system’s website (or create a simple application for VKontakte).</li>
<li>You can add to the widget code any custom HTML markup.</li>
<li>Any custom text or HTML/JavaScript code will be displayed instead of the standard WordPress comments.</li>
<li>Just leave the field empty to hide the comments on all pages.</li>
</ul>

WP Custom Comments

Replacing the standard WordPress commenting form with custom HTML/JavaScript code.

Disqus Conditional JS Load vs WP Custom Comments