Brett

Frontend Features: 
 – adds a toolbar to the bottom of WordPress pages that will show meaningful information that helps developers to create optimized WordPress sites. 
 – Info includes SQL queries, query vars, peak memory usage, and a filetrace.
Backend Features: 
 – Provides a very basic checklist with suggestions for development. 
 – Shows basic server stats and information 
 – phpInfo 
 – WP rewrite rules (coming soon)

Developer Toolbar

Adds easy to access data for developers, including a fixed toolbar to the bottom of pages that shows query data and memory usage among other data.

Juan Carlos Pereira Diaz

This plugin help you to test and check the performance of the plugins, themes and scripts you have 
installed in your wordpress site.
Its bring easy to read tables and charts that show what theme, plugin or page are the ones that are slowing down your website.
Its comes in several languages that guaranteed you will know how to use it or what is the problem in you site.
It makes it very simple to locate any bottleneck problem in your themes or plugins in order to solve it and speed up your website.
Save your scans and profiles in a history table to later use in your performance reports.
Install and active the plugin so you can start checking your wordpress site right away.
<h4>Features</h4>
<ul>
<li>Plugins & themes performance profiling.</li>
<li>Page performance profiling.</li>
<li>Saved profiling history scans.</li>
<li>Multi-language (EN, ES, GL).</li>
<li>Testing single themes or plugins.</li>
<li>Testing multiple pages charging times at once.</li>
</ul>
<h4>How to use</h4>
<ul>
<li><a href="https://www.tbplugin.com/herramienta-de-profiling-para-wp/" rel="nofollow ugc">Basic Use Video</a></li>
<li><a href="https://www.tbplugin.com/herramienta-de-profiling-para-wp/" rel="nofollow ugc">How to speed up your site</a></li>
</ul>

Profiling Tool For WP

A plugin for testing the performance of the themes, plugins and scripts of your Wordpress site.

Developer Toolbar vs Profiling Tool For WP