Harshit

View/Export useful network statistics related to sites, users per site, plugins per site, themes and plugins for all the sites in a WordPress multisite network.
The features include –
<ol>
<li>Background processing for generating new statistics for the network. It allows you to safely generate stats without compromising the performance of your large multisite network.</li>
<li>Ability to fine tune batch processing settings.</li>
<li>Protected network admin settings.</li>
<li>Notification when the stats are available.</li>
<li>D3 Visualizations</li>
<li>Generates set of CSV files corresponding to different types of stats.</li>
</ol>

WP Network Stats

View/Export network statistics related to users & plugins per site, themes, plugins and other site stats in your multisite network.

GreatBlakes

This is a WordPress plugin that adds advanced load timing to each page. Know exactly what is causing slow (or fast) page loading on every page. It’s like doing a lightweight and fast speed test on every page! It does not require any settings and is displayed at the bottom-left of the page. The overall load time is shown initially, and when clicked, the advanced load times appear.
The processes being timed are: 
Redirection (and quantity) 
App Cache 
DNS Lookup 
TCP Connection 
Server Request 
Server Response 
DOM Processing 
Page Load
This timing only display to site admins, and can also be triggered by adding “?debug” at the end of the URL. Considerably slow or fast times are dictated with coloring.

Simple Site Speed

Add page load times for admins on the front-end.

WP Network Stats vs Simple Site Speed