The extent of speed up PageSpeed Service provides depends on a variety of factors such as content on your pages, browser, geographic location of access, bandwidth, etc. This page lists instructions to schedule tests from different locations around the world, on different browsers and on different networks, so you can measure the exact speed up for your site, and understand the results.
Running the tests
- Go to http://www.webpagetest.org/compare
- Enter the URL of your website, say
- Choose the test location and browser. The default is IE8 from US East (Virginia).
- Select More Configurations... for a broader selection of locations, browsers and network connection type. The default connection type is DSL.
The test may take several minutes to complete, depending on the load on the test servers. The page will automatically refresh every 30 seconds and display the results when it is complete.
Understanding the results
The test involves rendering your website on the selected browser by directly visiting your site, and repeating the same test by proxying your site through PageSpeed Service.
A sample test result is shown below for illustration. The numbers in the
Original column indicate the load time for the page when accessing your
site directly. The numbers in the
Optimized column indicate the
load time for the page when your site is proxied through PageSpeed Service.
Difference column indicates the difference in load time between
the two test runs. The speed up values are shown as a percentage value in green
if PageSpeed Service speeds up your site. The percentage values are shown in
red if PageSpeed Service slows down your site. A slow down can happen due to
various reasons such as, the default configuration not being optimal for your
site. Dynamically changing content on your page can result in the
original and optimized test runs not being comparable due to differing number of
requests and response sizes. In such cases, please try running the tests on
other pages that are comparable
or visit this page later. We are constantly working to improve the service.
In the test below, PageSpeed Service loads the site 26.9% faster for the first
view, and 62.1% faster for repeat views of the same page. You can click on the
Play button (shown as a triangle) under
to view how the page would appear to load to an end user, with and
without PageSpeed Service.
|Page Load Time||1.715s||1.253s||-0.462s (26.9%)|
|Repeat View Page Load Time||1.445s||0.547s||-0.898s (62.1%)|
|Full Test Result||
|Performance improvements as reported by webpagetest.org|
You can click on the view test link in each column to see more details about the test run. The PageSpeed Score and grades for the test run are shown at the right top corner of the page. You can click on the First View and Repeat View links to find out more details on exactly how PageSpeed Service improved the loading of your page.