crUX freshness

[Ronnie Jones]

How often is the CRUX score refreshes inside page speed insights? If i made changes to improve site speed should I expect the CRUX report data to change immediately or the next time the data set is updated? I am asking as I've made a lot of changes to a site's speed but the CRUX still suggest the FCP and DCL are very slow

[Rick Viscomi]

Hi Ronnie,

PageSpeed Insights provides a rolling 30 day window. So if you make big perf changes today, it might be significant enough to influence the other 29 days in the window tomorrow but you'll need to wait a full 30 days before all of the slow perf is flushed out of the pipeline.

[Ronnie Jones]

That was the answer i was hoping for.

However, do you have any supporting documentation that confirms how the score works?

[Rick Viscomi]

We have official Chrome UX Report documentation at https://developers.google.com/web/tools/chrome-user-experience-report/#methodology and PSI docs at https://developers.google.com/speed/docs/insights/about.

Hope that helps!

[Ronnie Jones]

Now that i know its a monthly snapshot i am comfortable waiting for the report to update and not expect it to be instant

You've been very helpful thanks