Testing a page with Builder.io’s Performance Insights

Moving apartments is an absolute doozey. I’ve got no idea how folks in Western countries manage to move to an entirely new house, let alone how my parents managed to move our family to entirely new country when I was younger.

Anyway, things are a bit all over the place for me at the moment, so this newsletter will be a short one. I should be settled down in our new place and my own home office by the time the next newsletter rolls around.

Performance Insights is a relatively new entrant in the website performance tooling space. Created by the team at Builder.io it takes a slightly different approach to website performance auditing. Rather than presenting a whole swath of data on your site’s current performance, this tool focuses on what improvements you can make and the impact they could have.

Getting started

Head over to https://www.builder.io/c/performance-insights and enter in a web page URL. Hit ‘Analyze’ and the tool will start running the page through a series of emulated mobile Google Lighthouse tests.

The results

Once the tests have been run, you’ll be presented with a set of five cards showing you the results of the tests.

A screenshot of Performance Insights results.

Only the first card, titled “Current”, shows you information about how your website is performing at this point in time. The other four cards show you the potential impact of optimising different parts of your website’s content.

All the scores shown are the Lighthouse Performance Score. While this score isn’t the most representative web performance metric, in this case it does help to provide a nice and neat guide.

Personally, I find the way these results are presented to be very useful when starting out an audit on a website. They allow me to see where I can start looking to potentially find some quick wins. More and more I’ve found myself checking Performance Insights first, before diving into more detailed tools like WebPageTest.

Suggested improvements

Below the results, you’ll find a section with suggested improvements. To be honest, I don’t really scroll down this far when using Performance Insights.

In this section you’ll find a brief explanation about the suggested improvement, and some related libraries and tools you can use. Suggestions don’t appear to be customised based on your results, other than highlighting any high impact areas to look at.

Since Performance Insights is still in beta, I’m hopeful there’ll be a bit more work done to present suggested improvements that are relevant to your site’s results, and/or the tooling you use to build your site (improvements for a WordPress site could differ from those for a Gatsby site for example).


As promised, nice and short. The next issue of Optimised will be in your inbox on July 22nd. The website has an archive of all previous emails. It's a good place to recap on anything we've covered, and also handy to share with friends or colleagues. As always if you've got any feedback or specific topics you want to be covered then just reply to this email.

Keep safe, stay well.
Fershad.