Lists WordPress require() calls mainly for plugin code refactoring.

Modern Tribe, Inc.

Jonathan Brinley

Peter Chester

Debugger

You can use this plugin to manually log data or to capture logging on WordPress actions. You can capture load time, memory, backrace, data dumps, urls …

bruandet

nintechnet

Code Profiler – WordPress Performance Profiling and Debugging Made Easy

A profiler to measure the performance of your WordPress plugins and themes.

Konstantin Kovshenin

Debug Bar Slow Actions

Easily find out which actions and filters are the slowest during a page load.

tombenner

MySQL Profiler

Displays a list of each page's SQL queries and the functions calling them that can be searched and sorted by time, type, etc.

ChrisHurst

MyWebsiteAdvisor

Simple Debug

Analyzes WordPress website performance, helps to locate slow function hooks.

Artberri

WP XHProf Profiler

Adds PHP profiling support to your Wordpress using Facebook's XHProf Profiler.

tierrainnovation

WPDB Profiling

This plugin will give you the total number of queries to the db per page, as well as the total time it took to render those queries out to the page.

Amit Gupta

PMC Benchmark

A benchmarking plugin to profile slow hooks.

Viktor Szépe

<h4>Only for development!</h4>
<h4>Now with OPcache memory consumption support</h4>
<p>This plugin dumps the colorized filenames and memory consumptions or file sizes after the normal WordPress HTML output, after the closing html tag. This generates invalid HTML but gives you an overview of loaded plugins and the current theme.</p>
<p><em>What’s running</em> lists all files parsed and executed by the PHP engine. It can be used for plugin or theme refactoring.</p>
<h4>Now you can highlight your own plugin and theme</h4>
<p>Provide a part of its path in wp-config.php:</p>
<pre><code>define( 'WHATS_RUNNING_HIGHLIGHT', 'wp-content/plugins/my-plugin' ); </code></pre>
<h4>Color codes</h4>
<ul>
<li>your code is highlighted with YELLOW background</li>
<li>plugin files are in BLUE</li>
<li>themes files are in ORANGE</li>
<li>files in the wp-includes directory are in GREEN</li>
<li>files in the wp-admin directory are in GREY</li>
<li>all other files are in RED</li>
<li>VIOLET bar after the filename represents the file size ( 0.5 kB/px )</li>
<li>DARK MAGENTA bar after the filename represents the OPcache memory consumption ( 1 kB/px )</li>
</ul>
<h4>Links</h4>
<p>You can watch <a href="https://core.trac.wordpress.org/ticket/28364" rel="nofollow ugc">WP core bug #28364</a> to get more information about <a href="https://github.com/szepeviktor/WPHW/blob/master/wp-entry-points.md" rel="nofollow ugc">WordPress entry points</a>.</p>
<p>You can find some documentaion here what makes a WordPress plugin efficient: https://github.com/szepeviktor/WPHW</p>
<p>Development of this plugin goes on on <a href="https://github.com/szepeviktor/whats-running" rel="nofollow ugc">GitHub</a>.</p>


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