The CrUX dataset on BigQuery is updated on the second Tuesday of every month. Each release is numbered according to the year and calendar month of the data collection period, for example 201912 corresponds to the UX data collected during December 2019 and would be released on the second Tuesday of January 2020 after the data collection period has ended.
In the following list, we've curated some release notes for each monthly dataset. Subscribe to our CrUX Announce mailing list or follow @ChromeUXReport on Twitter for release Announcements.
202408
Publication date
- September 10, 2024
What's new
- Chrome has recently made a change to INP to no longer include
pointerup
events used for scrolling (for example when you scroll on mobile using your finger). This not only improved INP by excluding these events, but also resulted in a drop in coverage of INP. Some sites may notice the optional INP metric is no longer available in CrUX. - The Google Publisher Tag ad library released an INP optimization yielding on out-of-viewport Ad insertion logic reducing negative INP impact. Mobile INP pass rates improved from 55.58% to 66.12% for origins using GPT. Publishers can also further optimize ad insertion by using the GPT threadYield config option to yield even in-viewport ads.
- These changes—and the continued improvement in LCP—have contributed to the 2% increase in Core Web Vitals pass rates this month. It's great to see more than half of origins are now passing Core Web Vitals!
- As warned for the last few months, First Input Delay (FID) is now deprecated and we have now removed FID from CrUX. The BigQuery dataset with August data published today will be the last month with FID data. The CrUX API will have FID removed from it from today.
- We have similarly also removed Effective Connection Type (ECT) from CrUX, again as previously announced. The BigQuery dataset with August data published today will be the last month with ECT data. The ability to query the CrUX API by ECT will be removed from today. The course ECT buckets (low-2g, 2g, 3g, 4g) have been replaced in the CrUX API with a more fine-grained RTT latency p75 metric value. Note that this metric measures the internet connection latency of users of your site, rather than latency of your site directly. It is calculated based on recently observed application-layer RTT measurements across recently active connections, not just connections to your site. Removing ECT as a dimension, and replacing it with a non-dimensional metric, means more origins will meet the threshold for CrUX data in the future. This will mean we will be able to bring CrUX insights, including split desktop and mobile data, and navigation breakdowns to many more sites.
Notable stats
- 18,176,653 origins (↑ 1.2%)
- 64.8% of origins (↑ 1.1%) had good LCP
- 78.2% of origins (↑ 0.2%) had good CLS
- 85.0% of origins (↑ 0.8%) had good INP
- 50.1% of origins (↑ 2.0%) have good Core Web Vitals
202407
Publication date
- August 13, 2024
What's new
- This month we saw another good increase in Core Web Vitals pass rates across all metrics.
- There are a number of changes being worked on by the Chrome team (particularly for LCP and INP) which no doubt helped with these improvements, including the two changes to INP mentioned last month which should be fully rolled out now. We encourage those interested to check the Web Vitals Changelogs for more technical detail, and will continue to highlight particularly noteworthy changes in these monthly announcements.
- This month we did a small tweak to our CrUX API documentation, and brought back the CrUX API Explorer that we used to have on our documentation in the past, but which we had to remove for technical reasons. This allows readers of the docs to quickly check API responses. By viewing this explorer in full screen, you even get cURL, HTTP, and JavaScript snippets.
- This is also your final reminder that FID is deprecated and will be removed from Chrome tools in September 2024. Make sure you update any CrUX API applications to switch over to INP by then.
Notable stats
- 18,176,653 origins (↓ 1.4%)
- 64.1% of origins (↑ 1.2%) had good LCP
- 78.0% of origins (↑ 0.4%) had good CLS
- 84.4% of origins (↑ 0.4%) had good INP
- 49.2% of origins (↑ 1.6%) have good Core Web Vitals
202406
Publication date
- July 9, 2024
What's new
- This month we saw a good increase in Core Web Vitals pass rates across all metrics—a reverse of the slight regression we saw last month. If you've followed us carefully you'll be aware that some of the shifts may be seasonal, for example, in July 2023 we also saw a decrease in the number of origins, and an increase in pass rates for the Core Web Vitals.
- The Chrome team has been continuing work on improving efficiencies in Chrome's handling of the Core Web Vitals metrics and recently launched some changes to INP, most notably to better handle use of the basic modal dialogs (alert, confirm, print). While technically these are synchronous and block the main thread—and so are not recommended if there are alternatives—they do present user feedback for an interaction. They were previously not counted as presentation feedback for INP, which could result in very high INP values for sites that did use these. From Chrome 127 the presentation of the modal will mark the end measurement time for INP and so should lead to improved INP times for those sites.
- As previously mentioned, we're planning to remove the Effective Connection Type (ECT) dimension from CrUX in September 2024. With this release, we're including a preview of the new
round_trip_time
(RTT) metric in the CrUX API, which measures network latency. See our announcement for details. - And finally, as a reminder, FID is deprecated and will be removed from Chrome tools in September 2024. Make sure you update any CrUX API applications to switch over to INP by then.
Notable stats
- 18,442,199 origins (↓ 1.2%)
- 63.4% of origins (↑ 2.0%) had good LCP
- 77.8% of origins (↑ 0.5%) had good CLS
- 84.1% of origins (↑ 1.1%) had good INP
- 48.4% of origins (↑ 2.6%) have good Core Web Vitals
202405
Publication date
- June 11, 2024
What's new
- We have seen a slight regression in LCP this month, which has affected the overall Core Web Vitals pass rate. This seems to have particularly affected mobile scores (desktop LCP scores are actually slightly up). We've been unable to find a specific reason for this change, but this does come on the back of an impressive run of form with this only being the second negative month in the last year. So at this stage we're not concerned with this slight drop this month.
- We want to give you advance notice for a change we are considering to make in three months (for the September 10th release). We are looking to drop the Effective Connection Type (ECT) dimension since it is proving less useful as more and more internet traffic has moved to the wide-ranging 4G bucket. Having this as a dimension leads to other issues including a reduced coverage for origins and data. However, we do think measuring latencies on the web is important and are investigating replacement options, but as a metric rather than a dimension (so the other metrics will no longer be able to be queried by ECT). We would like to receive feedback from the current users of this data to understand how impactful this would be and if we need to consider more time for the migration. Let us know by responding to this email if you would be impacted by this change.
Notable stats
- 18,673,241 origins (↓ 0.2%)
- 62.1% of origins (↓ 0.5%) had good LCP
- 77.4% of origins (~ 0.0%) had good CLS
- 83.2% of origins (↑ 0.5%) had good INP
- 47.1% of origins (↓ 0.3%) have good Core Web Vitals
202404
Publication date
- May 14, 2024
What's new
- No significant updates in this release.
Notable stats
- 18,703,230 origins (↑ 0.2%)
- 62.4% of origins (↑ 0.3%) had good LCP
- 77.5% of origins (↑ 0.4%) had good CLS
- 82.8% of origins (↑ 0.8%) had good INP
- 47.3% of origins (↑ 1.1%) have good Core Web Vitals
202403
Publication date
- April 09, 2024
What's new
- All metrics have seen a good improvement this month, more than making up for last month's small declines. This is particularly apparent on mobile.
- We're aware of a two changes which resulted in INP improvements for a large number of sites this month:
- The Chrome Android team have made improvements to cookie caching, which saw noticeable improvements to INP and LCP. We think this was a large factor in the improvements we have seen this month.
- The team at Google have been working with a number of Consent Management Platforms (including OneTrust, Complianz and Axeptio), to improve INP by yielding more often—particularly when cookies are accepted. This has resulted in much improved INP for sites using these platforms.
- This month we are pleased to announce that we have added navigation type breakdowns to CrUX. By exposing the navigation type breakdown, we hope to encourage site owners to be more aware of the navigation types used on their sites, and look to encourage some of the faster types by looking at caching setup, bfcache blockers, and prerendering. For more details are available in the navigation types announcement post.
- We have also changed the CrUX API and CrUX History API to always round floating point numbers to 4 decimal places.
Notable stats
- 18,669,191 origins (↓ 0.3%)
- 62.2% of origins (↑ 1.5%) had good LCP
- 77.1% of origins (↑ 0.6%) had good CLS
- 82.1% of origins (↑ 1.8%) had good INP
- 46.8% of origins (↑ 2.6%) have good Core Web Vitals—a reminder this is now measured based on INP and not FID.
202402
Publication date
- March 12, 2024
What's new
- The big news this month is that INP is replacing FID from today as a Core Web Vital metric. This will be the last month that we report the FID numbers in these announcement reports. Tooling such as PageSpeed Insights and the CWVTech Report have been switched over to use INP when measuring Core Web Vitals pass rates using CrUX from today. FID should be considered deprecated now and will be removed from the Chrome tools, including CrUX, on 9th September 2024.
- We have regressed in most of the metrics this month by small amounts. We have not been able to ascertain any particular reason for this, and overall the metrics are still up from 2 months ago and previous, so we are treating these as more a slight "return to norm" of last month's impressive improvements rather than anything to be concerned about.
Notable stats
- 18,583,879 origins (↑ 0.8%)
- 48.8% of origins (↓ 0.4%) have good Core Web Vitals when using FID
- 45.6% of origins (↓ 0.4%) have good Core Web Vitals when using INP in place of FID as will be the case from today onwards.
202401
Publication date
- February 13, 2024
What's new
- The seasonal drop in origins from December has fully recovered.
Notable stats
- 18,583,729 origins (↑ 7.3%)
- 49.0% of origins (↑ 2.2%) have good Core Web Vitals
- 45.8% of origins (↑ 3.0%) have good Core Web Vitals when using INP in place of FID as will happen on March 12, 2024.
202312
Publication date
- January 09, 2024
What's new
- Most metrics improved this month with the exception of a very slight decrease in FID and INP. Increases and decreases in pass rates were most likely impacted by the larger than usual swing in origins this month rather than any changes that we are aware of. Such a swing in origins is usual for December.
- We are releasing a
form_factors
metric for the CrUX API and the CrUX History API. This metric is reported whenformFactor
is not specified as an input, that is, when requesting statistics for the overall origin or URL. In this case, we report the fraction of the page loads in the CrUX dataset that came from desktop, phone, and tablet—and in the CrUX History API we report a timeseries of these fractions. We think this data is often useful for further understanding the changes in overall performance of a site over time and for identifying opportunities. Note that in CrUX BigQuery, this information was already available (e.g. see[desktop|phone|tablet]Density
in themetrics_summary
table) and the CrUX Dashboard displays the desktop / phone / tablet fractions in its "Device Distribution" page.
Notable stats
- 17,323,447 origins (↓ 5.2%)
- 48.0% of origins (↑ 1.2%) have good Core Web Vitals
- 44.4% of origins (↑ 1.1%) have good Core Web Vitals when using INP in place of FID as will happen from March 2024.
202311
Publication date
- December 11, 2023
What's new
- More improvements across most of the metrics this month, though this time we're not aware of any particular changes to attribute this to.
- Our documentation has moved to new infrastructure, similar to the web.dev move in October. A huge benefit of this is that the CrUX documentation (and all other Chrome documentation) is available in 20 additional languages through machine translation, opening it up to many more people. Raise an issue if you spot any problems with this site move.
Notable stats
- 18,265,721 origins
- 47.4% of origins have good Core Web Vitals
- 43.9% of origins have good Core Web Vitals when using INP in place of FID as will happen from March 2024.
202310
Publication date
- November 14, 2023
What's new
- We're again seeing continual improvements likely due to the final rollout of the front end improvements to LCP started in August which particularly affected LCP (up a further 1.5% this month) and CLS (up 1.6%)
Notable stats
- 18,383,755 origins
- 46.9% of origins have good Core Web Vitals
- 43.4% of origins have good Core Web Vitals when using INP in place of FID as will happen from March 2024.
202309
Publication date
- October 10, 2023
What's new
- 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 had a bug whereby LCP may have been incorrect for some SPA applications when observed using 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 then this may have been the reason why.
Notable stats
- 18,405,462 origins
- 45.7% of origins have good Core Web Vitals
- 42.1% of origins have good Core Web Vitals when using INP in place of FID as will happen from March 2024.
202308
Publication date
- September 12, 2023
- What's new
- We're seeing continual improvements across most of the metrics which seem to be driven by the following changes:
- Chrome started rolling out a change to increase image priority from low to medium for the first 5 images which may have improved LCP and CLS (testing showed less impact on LCP, and more on CLS).
- Chrome made a change for LCP for animated image formats (for example, GIFs) which now measure the first frame rather than the full image load time as the LCP time. This is expected to improve the LCP for the small number of sites that have animated images as LCP elements.
- Chrome made another change for LCP whereby video elements are now considered as LCP element candidates. Previously they were only considered with a poster image. As videos are typically larger resources to download, this is expected to deteriorate the LCP for the small number of sites that have videos as LCP elements.
- Note that all of these changes are still rolling out so the full effect of all these changes has not been seen yet and hopefully we will see further improvements next month too.
- On a less positive note, INP pass rates remained static, showing it's a more tricky metric to optimize for.
Notable stats
- 18,263,523 origins
- 45.3% of origins have good Core Web Vitals
- 41.6% of origins have good Core Web Vitals when using INP in place of FID as will happen from March 2024.
202307
Publication date
- August 8, 2023
What's new
- As noted last month, we made progress on origins with redirects on their root page not showing in CrUX and since then we resolved the last of the known issues, and this month, no origins should be excluded for this reason.
- As warned in the last few releases, we have now removed the experimental prefixed Interaction to Next Paint metric from CrUX BigQuery, API, and History API. Users need to use the non-prefixed field to access this metric.
Notable stats
- 17,976,663 origins
- 44.6% of origins have good Core Web Vitals
202306
Publication date
- July 11, 2023
What's new
- We are pleased to announce that we have finally made progress on the long-standing root page redirect issue mentioned last month. Some origins which redirect their root page, and were therefore excluded from CrUX due to our lack of handling this properly, should now start to be included again from this month. Note that some origins are still being resolved, so not all origins are in this month's dataset. However, it is great that we have made some good progress on this now and we hope to have the issue fully resolved in the near future.
- This is the last month that the INP metric will be available in the CrUX BigQuery, API, and History API both with and without the experimental prefix. We encourage users to move to the non-prefixed field, as the experimental prefix fields should now be considered deprecated and will be removed in 30 days.
Notable stats
- 18,065,718 origins
- 44.1% of origins have good Core Web Vitals
202305
Publication date
- June 13, 2023
What's new
- We're seeing a slight decrease again this month for LCP and FCP due to the final roll outs of the change in LCP to ignore low-entropy images and correction in paint timing discussed last month. However, despite this, the overall good LCP, FID, and CLS rates are up slightly from last month.
- We are aware that some origins that redirect their root page (for example, https://www.example.com that automatically redirects to https://www.example.com/en/) are not showing origin-level data in CrUX, and so are also not appearing in the BigQuery dataset. We're also aware that this has been going on for some time. Unfortunately, this is proving a difficult issue to resolve, and so we still don't have an estimated time of when this will be fixed.
Notable stats
- 18,377,791 origins
- 43.6% of origins have good Core Web Vitals
202304
Publication date
- May 10, 2023
What's new
- We're seeing a slight decrease in pass rates for the Core Web Vitals, especially for LCP due in part to a change in LCP to ignore low-entropy images. We also see a decrease in FCP pass rates due to correction in paint timing (which also affects LCP but to a lesser extent).
- On a more positive note, the INP pass rate continues to improve with a further increase of 0.2%. This is especially important, as we are moving this metric from an Experimental metric to a Pending metric, and it will join the reset of the Core Web Vitals next year.
- From this release, the INP metric is available in the CrUX BigQuery, API, and History API, both with and without the experimental prefix. We encourage users to move to the non-prefixed field, as the experimental prefix fields should now be considered deprecated and will be removed in 90 days.
Notable stats
- 18,406,973 origins
- 43.5% of origins have good Core Web Vitals
202303
Publication date
- April 11, 2023
Notable stats
- 18,495,210 origins
- 44.2% of origins have good Core Web Vitals
202302
Publication date
- March 14, 2023
What's new
- We're seeing further improvements to the good INP rate which has increased by 2.3% to 77.3% of origins due to the improvement in the Chrome scheduler mentioned last month, which was still rolling out during February.
Notable stats
- 18,184,396 origins
- 43.1% of origins have good Core Web Vitals
202301
Publication date
- February 14, 2023
What's new
- Good INP increased by 4.3% to 75.6% of origins, primarily due to an improvement in the Chrome scheduler. The next frame is now scheduled with highest priority after discrete input events, which shortens the lag between input event and visual update.
- This month we've launched a CrUX History API, which provides 25 weeks of historical data at both origin and URL level. We've written a post detailing how to use this new API, and a Colab showing you an example of how to plot this historical data in various graphs.
Notable stats
- 18,203,637 origins
- 43.0% of origins have good Core Web Vitals
202212
Publication date
- January 10, 2023
What's new
- No significant updates in this release.
Notable stats
- 16,824,271 origins
- 41.8% of origins have good Core Web Vitals
202211
Publication date
- December 13, 2022
What's new
- No significant updates in this release.
Notable stats
- 17,618,944 origins
- 41.8% of origins have good Core Web Vitals
202210
Publication date
- November 8, 2022
What's new
- In this release we have further broken down our "rank" popularity. Previously these were in groupings of log 10 (i.e. top 1,000 sites, top 10,000, top 100,000 sites, … up to top 100 million sites). From this release these are provided in half-rank steps (i.e. top 1,000 sites, top 5,000 sites, top 10,000, top 50,000 sites, top 100,000 sites, top 500,000 sites… up to top 100 million sites). The top rank (1,000) won't be altered with this change (i.e. we are not providing a top 500 rank).
Notable stats
- 17,637,195 origins
- 41.6% of origins have good Core Web Vitals
202209
Publication date
- October 11, 2022
What's new
- The CrUX API now includes
collectionPeriod
object showing what day's data is included in the response as shown. More details in the CrUX API docs.
"collectionPeriod": {
"firstDate": {
"year": 2022,
"month": 9,
"day": 12
},
"lastDate": {
"year": 2022,
"month": 10,
"day": 9
}
}
Notable stats
- 17,715,277 origins
- 41.4% of origins have good Core Web Vitals
202208
Publication date
- September 13, 2022
Notable stats
- 16,754,655 origins
- 40.7% of origins have good Core Web Vitals
202207
Publication date
- August 9, 2022
What's new
- This release includes a change which records the CLS metric when the tab is backgrounded in addition to tab close. See the CLS changelog for details.
- We have identified a bug in our origin filtering which unfortunately affects a small number of origins, including some popular ones, which are missing from this release. We hope to get this fixed for future releases.
Notable stats
- 16,190,453 origins
- 40.6% of origins have good Core Web Vitals
202206
Publication date
- July 13, 2022
What's new
- The number of origins covered by the CrUX dataset increases once again in this release due to the optional dimensions feature introduced in the previous release. We expect the size to be much more stable from here.
Notable stats
- 16,230,572 origins
- 41.3% of origins have good Core Web Vitals
202205
Publication date
- June 14, 2022
What's new
- The percentage of origins having good LCP experiences increased this month by 2.4%, thanks in large part to an improvement in the performance of Chrome on Android. This was a major contributing factor to the percentage of origins having good Core Web Vitals increasing by 2.1%.
- With this release, CrUX records no longer require effective connection type and form factor, so we're including data for which these fields are
NULL
, indicating all effective connection types or form factors, respectively. This allows us to increase origin coverage by 28.2%. - An unrelated issue with our data pipeline prevents us from adding new origins in this release, so we're only including origins for which we published data in the previous 6 months. Due to this,
experimental.popularity.rank
has some gaps. For example, there are only 904 origins in the top 1,000. This is unique to the 202205 release and should be fixed next month.
Notable stats
- 11,024,795 origins
- 42% of origins have good Core Web Vitals
202204
Publication date
- May 3, 2022
What's new
- This release includes
experimental.interaction_to_next_paint
, our updated responsiveness metric. experimental_interaction_to_next_paint
in the CrUX API, with thresholds 200ms and 500ms.experimental_time_to_first_Byte
in the CrUX API, with thresholds 800ms and 1800ms.
Notable stats
- 8,602,902 origins
- 41.2% of origins have good Core Web Vitals
202203
Publication date
- April 12, 2022
What's new
- No significant updates in this release.
Notable stats
- 8,555,307 origins
- 39.6% of origins have good Core Web Vitals
202202
Publication date
- March 8, 2022
What's new
- This release includes
experimental.responsiveness
, our candidate for the new responsiveness metric. See web.dev/blog/responsiveness for details.
Notable stats
- 8,764,246 origins
- 39.0% of origins have good Core Web Vitals
202201
Publication date
- February 8, 2022
What's new
- Last month, Chrome broadly rolled out the back/forward cache in Chrome 97. These changes helped to improve the CLS pass rate by 4.4%, due to fewer layout shifts during page load. Similarly, we also saw a 2.4% improvement to LCP. These improvements are reflected in the percentage of origins having good Core Web Vitals increasing by 7.4%.
Notable stats
- 8,934,350 origins
- 37.6% of origins have good Core Web Vitals
202112
Publication date
- January 11, 2022
What's new
- No significant updates in this release.
Notable stats
- 8,398,796 origins
- 35.0% of origins have good Core Web Vitals
202111
Publication date
- December 14, 2021
What's new
- We've removed the old CLS metric:
experimental.uncapped_cumulative_layout_shift
is no longer in this BigQuery release, and CrUX API no longer servesexperimental_uncapped_cumulative_layout_shift
. Use the current CLS metric instead. - An LCP fix rolled out with M96.
Notable stats
- 8,733,078 origins
- 34.8% of origins have good Core Web Vitals
202110
Publication date
- November 9, 2021
What's new
- No significant updates in this release.
Notable stats
- 8,784,894 origins
- 34.1% of origins have good Core Web Vitals
202109
Publication date
- October 12, 2021
What's new
- There was a change to FCP in Chrome that ignores content with a style of opacity:0, increasing the user-perceived accuracy of the metric. Read more about it in the Chrome Speed change log.
Notable stats
- 8,660,068 origins
- 32.8% of origins have good Core Web Vitals
202108
Publication date
- September 14, 2021
What's new
- No significant updates in this release.
Notable stats
- 8,431,699 origins
- 31.3% of origins have good Core Web Vitals
202107
Publication date
- August 10, 2021
What's new
- No significant updates in this release.
Notable stats
- 8,174,923 origins
- 30.4% of origins have good Core Web Vitals
202106
Publication date
- July 13, 2021
What's new
- Changes to the FID metric took effect in Chrome 91, resulting in improved FID experiences involving double-tap-to-zoom on mobile.
Notable stats
- 8,416,608 origins
- 30.6% of origins have good Core Web Vitals
202105
Publication date
- June 8, 2021
Notable stats
- 8,411,670 origins
- 29.23% of origins have good Core Web Vitals
Notable Changes
- The BigQuery update 202105 includes the same CLS and LCP updates that we released on June 1 for the CrUX API (see below). The previous CLS metric will be available for a limited time as experimental.uncapped_cumulative_layout_shift
.
- API Update
- June 1, 2021
Notable Changes
- The new Cumulative Layout Shift definition is now the default metric surfaced as cumulative_layout_shift
, the previous Cumulative Layout Shift metric will be available for a limited time as it is phased out as experimental_uncapped_cumulative_layout_shift
.
- Largest Contentful Paint has undergone adjustments in recent Chrome versions and has been updated similarly in CrUX.
- First Contentful Paint tri-binning thresholds have been updated to be: [0-1.8s], (1.8s-3s), [3s-∞].
202104
Publication date
- May 11, 2021
Notable stats
- 8,423,302 origins
- 25.83% of origins have good Core Web Vitals
202103
Publication date
- April 13, 2021
Notable stats
- 8,326,310 origins
- 24.81% of origins have good Core Web Vitals
202102
Publication date
- March 9, 2021
What's new
- Coarse origin ranking data will be available in the CrUX dataset on BigQuery, starting in the February 2021 (202102) release. With this feature, we'll be able to unlock new insights into the aggregate user experiences of the head, torso, and tail of the web. All origins in the global and per-country tables will be assigned rank magnitude values under the experimental namespace, experimental.popularity.rank. Values will be powers of 10, starting with the top 1,000, then 10,000, 100,000... For example, a rank magnitude of 10,000 means that an origin is among the top 10,000 most visited origins in the dataset (learn more).
- Tell us what you think of this new feature. We welcome your feedback on the CrUX discussion forum.
Notable stats
- 8,264,371 origins
- 21.98% of origins have good Core Web Vitals
202101
Publication date
- February 10, 2021
Notable stats
- 8,185,540 origins
- 23.71% of origins have good Core Web Vitals
202012
Publication date
- January 12, 2021
Notable stats
- 7,629,156 origins
- 23.4% of origins have good Core Web Vitals
202011
Publication date
- December 8, 2020
What's new
- As of December 3, PageSpeed Insights (web and API) is sourcing its field data from the CrUX API, bringing the tools closer in alignment.
- We rolled out a small accuracy improvement to metrics' 75th percentiles in the CrUX API.
- The API results were frozen for a few days at the end of November and the issue has since been fixed.
Notable stats
- 7,942,408 origins
- 23.5% of origins have good Core Web Vitals
202010
Publication date
- November 10, 2020
What's new
- A CLS issue in Chrome 86 may cause regressions in CLS scores:
Notable stats
- 8,050,755 origins
- 23.7% of origins have good Core Web Vitals
202009
Publication date
- October 13, 2020
What's new
- No major changes in this release!
Notable stats
- 7,937,088 origins
- 24.6% of origins have good Core Web Vitals
202008
Publication date
- September 9, 2020
What's new
- There was a bump in origin coverage this month (+3.3%) due in part to a data pipeline change. Previously, for a user experience record to be included in the dataset, it must have included FP, DCL, and OL measurements. Now, the only required metric is FCP. This change helps to ensure that we're capturing more meaningful user experiences.
Notable stats
- 7,773,359 origins
- 24.9% of origins have good Core Web Vitals
202007
Publication date
- August 11, 2020
What's new
- No major changes in this release!
Notable stats
- 7,527,878 origins
- 25.2% of origins have good Core Web Vitals
202006
Publication date
- July 14, 2020
What's new
- User experiences served from Google's AMP cache are now attributed to the publisher's origin in CrUX. Effects will vary depending on the amount of AMP cache traffic relative to the rest of the website, but most origins see less than a 5 percentage point change in Core Web Vitals performance, with most effects being positive.
Notable stats
- 7,501,835 origins
- 25.34% of origins have good Core Web Vitals
202005
Publication date
- June 9, 2020
What's new
- There were two LCP updates, which should have a minimal effect on most origins
- There was one FID update, which may result in some sites observing faster FID experiences
Notable stats
- 7,103,486 origins
- 23.77% of origins have good Core Web Vitals
202004
Publication date
- May 12, 2020
What's new
- There was a small improvement to the way LCP is measured in M81. This may manifest itself in your CrUX data as a slight shift in slower LCP or in rare cases too few LCP samples to include for your origin.
- Introducing Web Vitals! CrUX is committed to providing you with all of your Core Web Vital metrics to give you an accurate picture of how real users experience the web.
- Do you query data on a per-country basis? Give the new
experimental.country
table a try! It's optimized to make querying across country and monthly datasets easier.
Notable stats
- 6,389,861 origins
202003
Publication date
- April 14, 2020
What's new
- CLS histogram start and end values changed from
INT64
toNUMERIC
type and divided by 100. This change aligns CLS with the fractional layout shift values provided by the Layout Instability API.
Notable stats
- 5,937,298 origins
202002
Publication date
- March 10, 2020
Notable stats
- 6,366,736 origins
202001
Publication date
- February 11, 2020
What's new
- Experimental metric on notification permission acceptance rates
Notable stats
- 5,976,293 origins
201912
Notable stats
- 5,532,155 origins
201911
Notable stats
- 5,821,306 origins
What's new
- The FID metric was moved from
experimental.first_input_delay
tofirst_input.delay
- The CLS metric was moved from
experimental.cumulative_layout_shift
tolayout_instability.cumulative_layout_shift
201910
Notable stats
- 5,752,729 origins
201909
Notable stats
- 6,008,004 origins
What's new
- The LCP metric was launched as
largest_contentful_paint
- CLS was updated to take move distance into account. Coverage may be lower while Chrome users upgrade to the latest version of the Layout Instability API
201908
Notable stats
- 6,011,463 origins
What's new
- FID coverage has returned to normal
- The average percent of fast experiences for most metrics dropped by about 2%, this appears to be due to a bug in Chrome
201907
Notable stats
- 5,612,504 origins
What's new
- There was an incremental update to Chrome's FID implementation, which included pointer events on mobile. Coverage will be lower while Chrome users update to the latest version
201906
Notable stats
- 5,624,797 origins
What's new
- The TTFB metric was added to the list of experimental metrics as
experimental.time_to_first_byte
201905
Notable stats
- 5,884,155 origins
What's new
- The CLS metric was added to the list of experimental metrics as
experimental.cumulative_layout_shift
201904
Notable stats
- 5,744,982 origins
What's new
- There was an incremental update to Chrome's FID implementation. Coverage will be lower while Chrome users update to the latest version
201903
Notable stats
- 5,703,255 origins
What's new
- There was an incremental update to Chrome's FID implementation. Coverage will be lower while Chrome users update to the latest version
201902
Notable stats
- 5,464,560 origins
201901
Notable stats
- 5,351,287 origins
201812
Notable stats
- 4,654,112 origins
201811
Notable stats
- 4,697,003 origins
201810
Notable stats
- 4,374,729 origins
201809
Notable stats
- 4,375,805 origins
201808
Notable stats
- 4,386,422 origins
What's new
- Histogram bins have been normalized to consistent widths (more info)
201807
Notable stats
- 4,202,945 origins
201806
Notable stats
- 4,134,123 origins
What's new
- The FID metric was added to the list of experimental metrics as
experimental.first_input_delay
(learn more)
201805
Notable stats
- 4,162,633 origins
201804
Notable stats
- 3,970,181 origins
201803
Notable stats
- 3,589,954 origins
201802
Notable stats
- 3,237,524 origins
201801
Notable stats
- 3,086,603 origins
What's new
- Added country dimension
201712
Notable stats
- 1,939,945 origins
201711
Notable stats
- 1,237,407 origins
What's new
- Expanded dataset with 1M+ origins
201710
Notable stats
- 10,000 origins
What's new
- Chrome User Experience Report beta preview is launched at Chrome Dev Summit