jamiechong

Export 2 Multisite exports your standalone database SQL for import into a WP multisite installation. It handles duplicate users (based on email) and will copy over all site settings including Widgets and Menus. You still need to copy the files for your themes, plugins and uploads.
<ul>
<li>This plugin has been minimally tested, but has been used to successfully migrate a handful of standalone sites to a multisite installation.</li>
<li>There is a good possibility it won’t work for sites that make use of a multitude of plugins – especially plugins that have their own database tables.</li>
</ul>
Installation
<ol>
<li>Create a new site on the Multisite.</li>
<li>Copy the plugins and themes from this standalone site to the Multisite.</li>
<li>Copy the files from wp-content/uploads/ on this site to wp-content/uploads/sites// on the multisite.</li>
<li>Backup the database on the Multisite.</li>
<li>Provide the Site ID of the Multisite. This can be found by hovering the mouse over the new site on Network Admin->Sites.</li>
<li>Provide the New URL. Example: //mysite.my-wp-multisite.com</li>
<li>Provide the New file path (The file path of the Multisite installation).</li>
<li>Export the database dump.</li>
<li>Import the SQL into your Multisite installation.</li>
</ol>
<ul>
<li>Important: The exported SQL will DROP the tables that were created for the Site ID you provided. So only perform this migration on new empty Sites.</li>
<li>Note that the you may need to review the exported SQL to ensure that plugin database tables have been exported correctly.</li>
<li>The site admin (username and password) is the user you created while creating the new Site, NOT the site admin of this standalone site.</li>
<li>The guts of this export plugin were inspired by <a href="https://iandunn.name/comprehensive-wordpress-multisite-migrations/" rel="nofollow ugc">this blog post</a></li>
<li>The code for this plugin has been modified from the <a href="https://wordpress.org/plugins/wp-migrate-db" rel="ugc">WP Migrate DB</a> plugin, but should not conflict with it in any way.</li>
</ul>

Export 2 Multisite

Exports your standalone database SQL for import into a WP Multisite installation.

mywebtonet

CPU performance testing: 
This plugin does various calculations and string manipulations on your PHP webserver 
and your MySQL database server. To further test the MySQL server, a sequence of MySQL 
inserts, selects, updates and deletes are performed in a separate custom database table 
(we do not use your WordPress tables for this).
Network testing: 
The network is tested by fetching directly from Google’s CDN / apis network. Fetching from the Google 
apis network gives you the nearest server, and will give more accurate results. We also fetch a small 1Mb 
file from our servers as well in case the Google apis is down. The network tests are not yet shown in the 
graphs, we are working on this 🙂
Results: 
After the sequence of tests has finished, the results will be displayed for you to evaluate. MySQL results can 
vary depending on the type of connection your webserver has to the MySQL server. If a “local socket” connection 
is used a typical result for the MySQL query test is 0.05-0.25 seconds. Web hosting providers with dedicated MySQL 
servers will show a slower time/queries per second, as a TCP/IP connection to the MySQL server is made instead of 
a local socket connection.
There are many factors that will determine how fast your website will run. This plugin does not test 
for how many hits/requests per second your provider allows to your website, file system performance is not tested 
either. Use it as a performance test to assess how fast a CPU your provider has allocated to your webserver 
and your MySQL database backend.
Share with your friends, let’s start a competition and see who’s got the fastests servers (hint) 🙂

PHP/MySQL CPU performance statistics

Benchmarks PHP and MySQL and does various performance analysis on these. Especially MySQL analysis is good.

In general benchmarks are short, but quite informative.

Works well and does various important tests

I had to measure the performance of my two local machines (a laptop and a desktop). This plugin came in handy to do exactly that. I only wish that there was a way to export the results for future ref!

Handy

With the performance test plugin you can test the CPU and MySQL speed on your webserver and your MySQL server.

Export 2 Multisite vs PHP/MySQL CPU performance statistics