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

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.

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 …

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.

Viktor Szépe

What's running

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

SmilingSyntax

Manjul

HookTrace – Trace Hooks with Precision

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

Amit Gupta

PMC Benchmark

A benchmarking plugin to profile slow hooks.

codetelemetrylab

CodeTelemetryLab Admin Performance Inspector

Profile your WordPress admin performance. Identify slow plugins, database queries, hook execution times, and memory usage from one clean dashboard.

devmarvs

Block Weight Inspector

See which blocks load which CSS/JS assets on a page and estimate their weight.

ChrisHurst

MyWebsiteAdvisor

Simple Debug Plugin for WordPress analyzes the performance of your WordPress website and shows you the slowest performing functions. 
Also has the ability to display other useful information such as error log, PHP.ini variables, and DB performance varbailes. 
MySQL Database Optimization tool is also included. 
You can also enable and view the debug.log with no editing of wp-config.php file necessary!
Developer Website: http://MyWebsiteAdvisor.com/
Plugin Page: http://MyWebsiteAdvisor.com/tools/wordpress-plugins/simple-debug/
Video Tutorial: http://mywebsiteadvisor.com/learning/video-tutorials/simple-debug-tutorial/
We are looking for testimonials and live examples of our plugins on your website! 
Please submit your website or testimonial here: http://MyWebsiteAdvisor.com/testimonials/ 
If we choose your testimonial or website we can link to your site and generate some free traffic for you!
Requirements:
<ul>
<li>PHP 5.3</li>
</ul>
To-do:

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