Summary

Hey all, I have been investigating the numbers reported by Pagespeed Insights API (therefore Lighthouse) for my company's SDK. We can see a massive spike in the metric from a third-party website that lets us understand changes over time to metrics such as main thread time.

Based on the below, has a change been released to PageSpeed Insights that could explain these differences? I believe the v11.6.0 would have been deployed around that date, so could this contribute to these changes in reporting?

I appreciate Econify is a third-party platform, but we have confirmed that they use PageSpeed Insights API under the hood.

https://www.econify.com/performance/vendor/permutive-app

Interestingly enough, the main thread time varies substantially between a few other providers too, where some improve drastically and others appear to worsen.

https://www.econify.com/performance/vendor/contextweb?date=Mar+26%2C+2024&device=mobile&type=article&range=1m

https://www.econify.com/performance/vendor/google-analytics

More vendors:

• https://www.econify.com/performance/vendor/appnexus
• https://www.econify.com/performance/vendor/the-trade-desk
• https://www.econify.com/performance/vendor/sharethrough
• https://www.econify.com/performance/vendor/smart-adserver
• https://www.econify.com/performance/vendor/openx
• https://www.econify.com/performance/vendor/speedcurve-rum
• https://www.econify.com/performance/vendor/triplelift