The 202309 dataset is live

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Barry Pollard

۱۸ مهر ۱۴۰۲، ۷:۵۵:۳۹۱۴۰۲/۷/۱۸
به 'Barry Pollard' via Chrome UX Report (Announcements)

Hi CrUX users,

This is your monthly announcement that the latest dataset has been published to BigQuery.

The 202309 (September 2023) dataset is now available and it covers 18,405,462 origins, an increase of 0.8% over last month. Here’s a look at origins' Core Web Vitals performance this month:

  • 58.5% of origins had good LCP

  • 95.8% of origins had good FID

  • 74.7% of origins had good CLS

  • 45.7% of origins had good LCP, CLS and FID

  • 78.0% of origins had good INP

  • 42.1% of origins had good LCP, CLS and INP

We’re again seeing continual improvements across most of the metrics despite the fact that FCP and TTFB actually had slight downturns. This suggests that the front end improvements to LCP mentioned last month which were still rolling out during September, likely more than counter acted these downturns.

One thing not mentioned last month until we saw the impact, was that WordPress had a number of improvements in the latest release, in particular for LCP images. This looks to have resulted in a measurable boost for WordPress sites compared to the web as a whole and, given it is used on about a third of the sites in the CrUX dataset, also would help explain the further improvement in LCP.

While on the subject of LCP, Chrome 117 introduced a bug whereby LCP may have been incorrect for some SPA applications when observed via Web APIs. This bug did not affect CrUX, nor Google Search Console data which is fed from CrUX. It has been fixed for Chrome 118 which started rolling out last week. If you noticed a large increase in LCP in your RUM solutions, but not in CrUX, then this may have been the reason why.

Please find our documentation at

If you have any questions about CrUX, feel free to reach out to us on any of these channels:



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