Artberri

WP XHProf Profiler plugin is an easy way to profile your plugins and themes when you are coding or debugging. To get it done it uses XHProf, a PHP profiler made by the Facebook Dev Team (you must install it before activating the plugin).
<h4>Usage</h4>
By default the profiling is disabled, activate <code>WP_DEBUG</code> on your <code>wp-config.php</code> to enable it. After doing it, all your wordpress pages will have a link at bottom with the profiling data.
<h4>¿What is XHProf?</h4>
From <a href="" title="From PHP documentation" rel="nofollow ugc">http://www.php.net/manual/en/intro.xhprof.php</a>
XHProf is a light-weight hierarchical and instrumentation based profiler. During the data collection phase, it keeps track of call counts and inclusive metrics for arcs in the dynamic callgraph of a program. It computes exclusive metrics in the reporting/post processing phase, such as wall (elapsed) time, CPU time and memory usage. A functions profile can be broken down by callers or callees. XHProf handles recursive functions by detecting cycles in the callgraph at data collection time itself and avoiding the cycles by giving unique depth qualified names for the recursive invocations.
XHProf includes a simple HTML based user interface (written in PHP). The browser based UI for viewing profiler results makes it easy to view results or to share results with peers. A callgraph image view is also supported.
XHProf reports can often be helpful in understanding the structure of the code being executed. The hierarchical nature of the reports can be used to determine, for example, what chain of calls led to a particular function getting called.
XHProf supports ability to compare two runs (a.k.a. “diff” reports) or aggregate data from multiple runs. Diff and aggregate reports, much like single run reports, offer “flat” as well as “hierarchical” views of the profile.
Additional documentation can be found via the xhprof website » [http://pecl.php.net/package/xhprof]
<h4>Support</h4>
Comments, questions, feature requests and bug reports are welcome: <a href="http://www.berriart.com/en/xhprof-profiler/" title="XHProf Profiler" rel="nofollow ugc">http://www.berriart.com/en/xhprof-profiler/</a>

WP XHProf Profiler

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

SmilingSyntax

Manjul

HookTrace is a developer observability tool that records and visualizes the runtime execution order of WordPress hooks, filters, and plugin initialization for a single page request.
For Developers Only
This plugin is designed exclusively for development and staging environments. It helps developers understand:
<ul>
<li>Which hooks fired, in what order</li>
<li>Which callbacks executed on each hook</li>
<li>Callback priority and execution time</li>
<li>Source plugin, theme, or core location</li>
<li>Exact file and line number</li>
<li>Plugin and theme load timeline</li>
</ul>
Key Features:
<ul>
<li>Hook List Tracking – Records all hooks that fire during a page request with type and source information</li>
<li>Detailed Callback Inspection – When a hook is selected, displays comprehensive callback information including priority, execution order, duration, file path, and source</li>
<li>Modern Modal UI – Beautiful, searchable interface with filtering capabilities</li>
<li>Zero Performance Impact – In-memory storage only, no database writes</li>
<li>Early Boot Support – MU-plugin bootstrap captures hooks from the very beginning</li>
</ul>
Requirements:
<ul>
<li><code>WP_DEBUG</code> must be set to <code>true</code> in <code>wp-config.php</code></li>
<li>User must have <code>manage_options</code> capability (administrator)</li>
<li>PHP 8.0 or higher</li>
</ul>
Safety Features:
<ul>
<li>Automatically disables when <code>WP_DEBUG</code> is false</li>
<li>Never runs for non-admin users</li>
<li>Never modifies WordPress behavior</li>
<li>Observational only – no code execution changes</li>
</ul>

HookTrace – Trace Hooks with Precision


I think this is a brilliant piece of dev tool!



Although Query Monitor has something similar, this plugin has a singular focus and thus, have a wider possibility to be useful in this particular area of seeng and analyzing what's happening on each and every hook fired. Looking forward to explore using it more in my dev workflow.



Thank you for developing it.


Brilliant!

Cross-Plugin Debug & Trace Recorder - Records and visualizes hook execution order for WordPress developers.

WP XHProf Profiler vs HookTrace – Trace Hooks with Precision