Scripting YSlow and/or PageSpeed

Question

As I'm starting to do some front end engineering at work, I would like to properly quantify the speedup achieved.

I would like to be able to use an average value of, say, 50 page load times measured by YSlow or Google Page Speed. Obviously, I don't want to hit reload 50 times and write down the value.

Is there a FF plugin for that or will I have to write a Firebug extension myself? Or maybe there is a non-FF, command-line tool that does what I'm planning?

Answer 1

I recently did a talk about this at Google Test Automation Conference in Zurich for this.

Slides for it are here

And I did a blog post on my company site about it and that can be found here

We were able to use the YSlow Beacon and Selenium together to automate the entire process.

I hope that helps!

Answer 2

Also check out GTmetrix which can do PageSpeed and YSlow analysis from a variety of reasons and has a free API you can use to automate this.

Answer 3

Not sure if you use Grunt in your development workflow, but there is a great package avaible that allows for easy scripting - check it out:

https://www.npmjs.org/package/grunt-pagespeed

Once you run it, it will output the results as follows:

Or, if you prefer to write your own, the Google PageSpeed API is also quite easy to use. Check out this blog post for more information:

http://deanhume.com/home/blogpost/the-google-pagespeed-api-and-mvc-4/86