Parsa

<p>This plugin optimizes WordPress meta data storage by saving all meta data for each post, comment, user, or term in a single row with separate columns for each meta key. This reduces the number of rows and improves the query performance and data export. The plugin works seamlessly with WordPress core functions and hooks, and supports any plugins that use them. Some of the features of this plugin are:</p>
<ul>
<li>Custom database tables for each type of meta data (post, comment, user, term)</li>
<li>Compatibility with WordPress queries</li>
<li>Faster queries and easy data export</li>
<li>Data migration from default WordPress meta tables</li>
<li>Option to exclude specific fields from core meta tables</li>
<li>Support for popular plugins and themes such as Advanced Custom Fields, Meta Box, CMB2, and more.</li>
</ul>


Meta Optimizer

Meta Optimizer is a WordPress plugin that helps you speed up your website by using meta data. It lets you optimize the meta tables for your posts, com …

Ren Ventura

<p>WP Private Comment Notes will let WordPress admins/moderators add and manage private notes for each comment left through the WordPress commenting system. Additionally, each note can be shared with the user who left the original comment.</p>
<p>Comment notes can come in handy when managing popular blogs. WP Private Comment Notes serves as a “note to self” tool for comment moderators, or a private method of communication with the commenter.</p>
<h3>Credits</h3>
<p>Thanks to <a href="https://www.iconfinder.com/anir" rel="nofollow ugc">Ana Nirwana</a> for the cool little message icon.</p>


WP Private Comment Notes

Add private notes to WordPress comments with an option to email the original commenter.

Meta Optimizer vs WP Private Comment Notes