gerrygooner

This WordPress plugin will cleanup your WordPress database, performing the following actions:
<ul>
<li>Remove all post revisions.</li>
<li>Remove all spam comments.</li>
<li>Remove all unapproved comments.</li>
<li>Remove all unused tags.</li>
<li>Remove all unused post meta.</li>
<li>Optimize MySQL tables by removing all unused table space.</li>
</ul>
Based on WP-Cleanup by JortK, this plugin replaces usage of mysql_query() that was deprecated in PHP 5.5 with WP_Query functions .

WP-CleanDB

cleancoded

This plugin cleans and optimizes WordPress code for improved website performance and faster page load times. Whether you’re using a custom child theme or a marketplace theme template, this plugin will clean the code and improve performance.
It adds a variety of site-wide optimization options to the WordPress backend:
<ul>
<li>Disable emojis</li>
<li>Disable embeds</li>
<li>Remove query strings</li>
<li>Disable XML-RPC</li>
<li>Remote jQuery Migrate </li>
<li>Hide WP Version</li>
<li>Remove the wlwmanifest link</li>
<li>Remove the RSD link</li>
<li>Remove the shortlink tag</li>
<li>Disable RSS feeds</li>
<li>Disable RSS feed links</li>
<li>Disable self pingbacks</li>
<li>Remove REST API links</li>
<li>Disable dashicons</li>
<li>Disable Google Maps</li>
<li>Disable Heartbeat</li>
<li>Update Heartbeat frequency</li>
<li>Limit/disable post revisions</li>
<li>Update autosave frequency</li>
<li>Change the login URL</li>
</ul>
WooCommerce optimization options:
<ul>
<li>Diable scripts except on product, cart and checkout pages</li>
<li>Disable cart fragmentation</li>
<li>Disable the status meta box</li>
<li>Disable widgets</li>
</ul>
The plugin also offers CDN rewrite support, a script manager to disable CSS/JS on a page-by-page basis, DNS prefetch and preconnect support, as well as backend accessibility mode.
<h3>Roadmap</h3>
<ul>
<li>Lazy load images</li>
<li>HTTP/2 server push</li>
<li>Sync Google Analytics locally</li>
<li>Delete expired transients</li>
<li>WordPress menu cache</li>
<li>Parse and remove all HTML comments in source code</li>
<li>Disable blog (comments, categories, tags, etc.)</li>
<li>Minify HTML/JS/CSS</li>
<li>Disable Google Fonts</li>
<li>Disable comments globally</li>
<li>White label for marketing agencies</li>
</ul>

Code Cleaner

Code Cleaner cleans and optimizes WordPress code for improved website performance and faster page load times.

WP-CleanDB vs Code Cleaner