shawfactor

This plugin logs all wordpress queries in the current page request as a html comment at the end of your output.
It only does so when the get variable lh_log_queries is set. That variable has three settings. 
1. queries: this logs queries only 
2. hooks: this logs hooks only 
3. both: this logs both hooks and filters
Like this plugin? Please consider <a href="https://wordpress.org/support/view/plugin-reviews/lh-log-queries/" rel="ugc">leaving a 5-star review</a>.
Love this plugin or want to help the LocalHero Project? Please consider <a href="https://lhero.org/portfolio/lh-log-queries/" rel="nofollow ugc">making a donation</a>.

LH Log Queries and hooks

Decisions not options for query and hook logging

Avram

Ultimate debug bar for your WordPress website. On each page of your website a neat debug bar will be displayed with the following info:
<ul>
<li>PHP version</li>
<li>Request execution time</li>
<li>Request memory consumption</li>
<li>WordPress-related PHP constants defined in your wp-config.php file</li>
<li>All website options (wp_options)</li>
<li>Request data</li>
<li>Timeline (waterfall) where you can see which portion of execution takes too much time</li>
<li>List of all hooks triggered on the page whose execution time exceeds 1ms, along with some stats</li>
<li>List of all database queries performed on the page, along with their source and execution time</li>
<li>Last 100 lines of your debug.log file (if it exists in wp-content)</li>
<li>List of loaded PHP files (categorized)</li>
</ul>
Besides that, it will track request data/hooks/db queries/mem. consumption in AJAX calls too (beta).
This plugin is meant to be used during development and/or debugging only. Only administrators and network administrators (in multi-site environment) can see the debugbar, unless the <code>WP_DEBUG</code> is set to <code>true</code>. In that case, everyone will see the debugbar.
Try it instantly on <a href="https://tastewp.com/new?pre-installed-plugin-slug=ultimate-debugbar&redirect=%2F&ni=true" rel="nofollow ugc">tastewp.com</a>!

Ultimate DebugBar

Ultimate debug bar for your Wordpress website.

LH Log Queries and hooks vs Ultimate DebugBar