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Enhance Web Performance Experiments with WebPageTest's New Feature: Edit Response HTML!
We're happy to announce the addition of a new custom experiment in WebPageTest Pro! The new "Edit Response HTML" experiment is one of our most powerful yet, as it allows you to freely edit the initial HTML of a website and compare the performance of that edited version to the live website.
The use cases for this experiment are infinite...
Each of these situations would have been difficult or impossible to pull off with our existing Find & Replace experiment, yet they are now trivial using this new freefrom editing experiment.
Your edits can be as simple or dramatic as you need. To demonstrate the power of this feature, here's an experiment I ran that replaced the entire HTML of my personal website with the HTML from Google Flights' homepage instead:
See these experiment Results here.
Now, that particular experiment wasn't useful for much other than showing me that from a performance perspective I am probably better off being myself, but you get the idea: this is a new level of control in performance experimentation!
To try it out, you'll need a WebPageTest Pro account... then:
Like all WebPageTest Experiments, the experiment changes are applied to the live website mid-response using our proxy server, and the browser will receive the modified version of the website as if it came from the server. Also, all experiments include a control run so that both the experiment and control are proxied in the same environment.
If you don't yet have a WebPageTest Pro account, you can still try out all of the experiments we offer by running a test on our special, poor-performing test site, The Metric Times! You'll just need to sign into your free WebPageTest account first and then you can try running experiments on this test, for example!
Also, we should mention that a couple of our experiments are free to use on any site with your free WebPageTest account. Namely, the "Defer JavaScript" experiment, and the "Add HTML to the end of Head" experiments... both quite useful in their own right!
This experiment is automatically available today for all WebPageTest Pro users. We hope you love it. As this is a first release of the new feature we appreciate any comments, use cases, bug reports, and feedback.