regen

This plugin compresses javascript files and CSS files loaded by the theme or other plugins automatically. 
Extra spaces, lines, and comments will be deleted. 
The compressor is based on <a href="http://code.google.com/p/jscsscomp/" rel="nofollow ugc">jscsscomp</a>.
<h4>Features</h4>
<ul>
<li>Auto-compression for the blog header.</li>
<li>Template tags which provide javascript compression.</li>
<li>You can turn on/off compressions in the admin page.</li>
<li>Editable CSS compression condition.</li>
<li>You can select where to output scripts.</li>
<li>You can exclude scripts from the compression if necessary.</li>
</ul>

Script Compressor

This plugin compresses javascript files and css files.

ChrisHurst

MyWebsiteAdvisor

Simple Optimizer Plugin for WordPress is a group of tools to assist you manage your WordPress website.
Check, Repair and Optimize the WordPress MySQL Database. 
Search for and Delete Spam, Revisions, Auto Drafts, Pending Comments and Transient Options.
<a href="http://MyWebsiteAdvisor.com/tools/wordpress-plugins/simple-optimizer/" rel="nofollow ugc">Upgrade to Simple Optimizer Ultra</a> for advanced features including:
<ul>
<li>Scheduled Automatic WordPress and Database Optimizations</li>
<li>Recieve email notification of the scheduled optimization status</li>
<li>Priority Support License</li>
</ul>
Check out the <a href="http://www.youtube.com/watch?v=3PU6g-vMdtM&hd=1" rel="nofollow ugc">Simple Optimizer Plugin for WordPress Video Tutorial</a>:
<iframe loading="lazy" title="Simple Optimizer for WordPress Video Tutorial" width="750" height="422" src="https://www.youtube.com/embed/3PU6g-vMdtM?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
Developer Website: http://MyWebsiteAdvisor.com/
Plugin Support: http://MyWebsiteAdvisor.com/support/
Plugin Page: http://MyWebsiteAdvisor.com/tools/wordpress-plugins/simple-optimizer/
Video Tutorial: http://mywebsiteadvisor.com/learning/video-tutorials/simple-optimizer-tutorial/
Requirements:
<ul>
<li>PHP v5.0+</li>
<li>WordPress v3.3+</li>
</ul>
To-do:

Simple Optimizer

Check, Repair and Optimize WordPress Database. Delete Spam, Revisions, Auto Drafts, Pending Comments and Transient Options.

Script Compressor vs Simple Optimizer