DareBoost

Performance Tester is a WordPress plugin that allows you to launch a performance and quality analysis on your WordPress home page directly from your backoffice. 
The report is provided by <a href="https://www.dareboost.com" rel="nofollow ugc">DareBoost</a>.
Easily launch an analysis and get :
<ul>
<li>Major metrics of web performance (loading time, page weight) and DareBoost score</li>
<li>Relevant performance timings (first byte, page interactive, page fully load)</li>
<li>3 improvement priorities to optimize your WordPress</li>
<li>A direct access to a full report on <a href="https://www.dareboost.com" rel="nofollow ugc">DareBoost</a>, with all your issues and recommandations to optimize your website (for free)</li>
</ul>

Performance Tester

Analyze the home page of your WordPress site directly from your backoffice and get a quality and performance report.

WordPress.org

Dion Hulse

Andrew Nacin

Most sites are able to apply updates in the background. Background Update Tester checks your site for compatibility and explains any problems.
After activating this plugin, visit the Dashboard → Update Tester screen. (If you are using multisite, visit Updates → Update Tester in the network admin.)
This is an initial release.

Background Update Tester

Most sites are able to apply updates in the background. Background Update Tester checks your site for compatibility and explains any problems.

Performance Tester vs Background Update Tester