Alex Furr

simon.ward

The Multisite Auditor gives details on which sites are using which themes and which plugins. This plugin is optimised and designed for large multisite installations that have more than 1000 sites. However, it will also work very well with smaller networks.
Features
<ul>
<li>Displays data and stats for each any every theme and plugin</li>
<li>Shows theme use across the entire network</li>
<li>Shows plugin use across the entire network</li>
<li>Quickly view the most popular themes and most activated plugins</li>
<li>Shows themes that no longer exist – i.e. broken sites</li>
<li>Easily bulk switch sites using one theme from another</li>
<li>Uses jQuery datatables for much easier sorting / searching that the standard WP tables</li>
<li>Audit your site once – data is kept to date automatically</li>
</ul>

Multisite Auditor

The only plugin that can properly audit your themes and plugins for LARGE multisite installations (1000+ sites)

Christian Jongeneel

The Theme and Plugin Profiler uses a little known PHP feature known as ticks. Basically, this is an internal event that occurs every time a code block is executed, marked (roughly) by a function call or curly {} brackets.
The plugin uses ticks to collect a list of the functions that were executed, how often they were called and how much time they took in total. The plugin’s option page gives some filters to select and sort the results. This will give developers clues which parts of their code demand scrutiny.

Theme and Plugin (T&P) Profiler

Make your theme or plugin faster, greener and smarter with this plugin, that will tell you which of your functions is eating up most server time.

Multisite Auditor vs Theme and Plugin (T&P) Profiler