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Google CrUX Update Adds RTT Insights, Retires ECT Metric

  • Last updated March 12, 2025
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Mountain View, CA | February 13, 2025Google’s CrUX update adds RTT speed insights and retires ECT, offering detailed data for page speed optimizations and SEO performance improvements.

Google has just rolled out a major update to its Chrome User Experience Report (CrUX), bringing in granular network speed insights (RTT) while retiring the outdated Effective Connection Type (ECT) metric. This game-changing update promises faster website optimizations and improved SEO strategies.

The CrUX update introduces RTT (Round Trip Time) tri-bins, providing real-time network speed data instead of generic 3G/4G labels. This shift helps SEO professionals and web developers identify high-latency regions and optimize page load times for specific audiences.

Barry Pollard, Web Performance Developer Advocate at Google Chrome said:

Additionally, CrUX now offers granular LCP (Largest Contentful Paint) image subpart data, enabling developers to pinpoint exact causes of slow-loading images, from server lags to render delays.

The removal of the ECT metric allows Google to provide richer data across a broader range of websites, enhancing performance analysis. An SEO expert from Search Engine Journal said:

With updated BigQuery datasets and CrUX Vis tool enhancements, businesses can now fine-tune their SEO strategies, ensuring faster page speeds and better user experiences globally.

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