Amit Gupta

This plugin is to lookup which hooks are slow in execution in plugins and current theme.
This plugin needs <a href="https://wordpress.org/plugins/debug-bar/" rel="ugc">Debug Bar</a> plugin to be installed and activated. It adds a panel labelled “PMC Benchmark” in it.
This plugin is for use in development environment only and not meant for use in a production environment.
Github: https://github.com/Penske-Media-Corp/pmc-benchmark

PMC Benchmark

A benchmarking plugin to profile slow hooks.

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:

Simple Debug

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

PMC Benchmark vs Simple Debug