CDN Speed Test is aimed to test the performance of the OVH CDN in terms of delivery speed as compared to the same content (or a similar one) loaded without the help of the CDN.

The principle is to load the same content in miscellaneous CDN vs. dedicated server configurations. Page loading is made using standard browsers using the WebDriver automation framework. Several tests are performed in each test run in random order. All the timings are displayed. Finally, we remove all timings outside a 95% confidence zone before displaying mean values for each page and browser.

Please notice WebDriver has an important overhead. However, this does not affect the relative difference between results, when performed manually using the developer tools included in browsers.

• Get the project.

• Get facebook/php-driver and copy it in webdriver/php-webdriver

• Update the contents of www/css/style-*.css files to point to your server (default are *.test.korolczuk.fr).

• Update the contents of www/img/from-cdn.html and /www/img/from-server.html to point to your server.

• Configure your CDN accordingly to your settings (including the OVH CDN).

• Configure the Apache web server accordingly to your settings (or any other web server with a configuration equivalent to the one in www/.htaccess).

• Configure your DNS accordingly to you settings. Wait for propagation (depends of your DNS configuration, often up to 24 or 48 hours).

• Get Chrome WebDriver (aka ChromeDriver), install and launch it (needed in the default code configuration; see webdriver/index.php, $webDrivers to modify default behavior).

• Get Selenium WebDriver (aka Selenium), install and launch it (optional; see webdriver/index.php, $webDrivers to modify default behavior).

• Get any other WebDriver, install and launch it (optional; see webdriver/index.php, $webDrivers to modify default behavior).

• Launch each test at least (using your favorite browser or running this performance suite) in order to force the CDN data upload.

php webdriver/index.php

Each test page is made of one HTML content and a set of CSS stylesheets and PNG images.

There are 3 different web pages:

• from-host.html: the HTML content as well as resources are loaded from the current host (server or CDN);
• from-cdn.html: the HTML content is intended to be loaded from the dedicated server, while all the resources are loaded from the CDN;
• from-server.html: the HTML content is intended to be loaded from the dedicated server, while all the resources are loaded from the CDN.

There are several resources:

• css/pure-min.css is Yahoo! Pure reset stylesheet;
• css/style-*.css are page-specific stylesheets, one per host configuration;
• img/?.png are various images;
• img/bckgrnd.png is a background image referenced by the page-specific stylesheet.

There are 4 test configurations (here with default values):

<tr>
    <td>CDN / CDN</td>
    <td>http://cdn.test.korolczuk.fr/from-host.html</td>
    <td>http://cdn.test.korolczuk.fr/</td>
</tr>

<tr>
    <td>Server / CDN</td>
    <td>http://test.korolczuk.fr/from-cdn.html</td>
    <td>http://cdn.test.korolczuk.fr/</td>
</tr>

<tr>
    <td>Server / Server<br />(same host both)</td>
    <td>http://test.korolczuk.fr/from-host.html</td>
    <td>http://test.korolczuk.fr/</td>
</tr>

<tr>
    <td>Server / Server<br />(two different hosts)</td>
    <td>http://test.korolczuk.fr/from-server.html</td>
    <td>http://server.test.korolczuk.fr/</td>
</tr>

An example of what you see in your browser:

An example of the console output:

Mean page load times in the 95% confidence zone:

                                                chrome      chrome      firefox     firefox
                                                total       relative    total       relative
http://cdn.test.korolczuk.fr/from-host.html      908.5 ms   +246.0 ms   1094.7 ms   +628.4 ms
http://test.korolczuk.fr/from-cdn.html           774.8 ms   +112.2 ms    528.8 ms    +62.6 ms
http://test.korolczuk.fr/from-host.html          662.5 ms     +0.0 ms    493.1 ms    +26.9 ms
http://test.korolczuk.fr/from-server.html        662.9 ms     +0.4 ms    466.2 ms     +0.0 ms

For any remark or comment, just drop a mail to [email protected].