WebPageTest News: It's Web Vitals Wednesday!

Introducing the Core Web Vitals Summary page, Webinar recap, and Image Optimization Tips from Addy Osmani [WebPageTest Logo] It's Web Vitals Wednesday May 12, 2021 [CWV Gif] NEW FEATURE Introducing the WebPageTest Web Vitals Summary page with detailed debug information and tailored views. Haven't seen it yet? Go ahead, [run a test](. Click on the Web Vitals summary to see exactly why your LCP, CLS, and (coming soon) TBT are good, bad, or "meh" according to the Chrome Field Performance benchmarks. 🎨 Largest Contentful Paint (LCP) - With screenshots and a truncated waterfall at the point where LCP fired, you can see exactly what is holding up your LCP, and only LCP. ⏩ Cumulative Layout Shift (CLS) - View where your shifts are coming from and hover over screenshots to visually understand what is causing the shifts. 🚧 Total Blocking Time (TBT) - Detailed info coming soon. [Run a WebPageTest for Web Vitals]( [Pat Tim] WEBINAR Speaking of Web Vitals...Pat & Tim bring you up to speed in the latest webinar hosted by Xellentro: [Understanding the Evolution of Performance Metrics.]( Tune in to hear how we got to this point, the metrics we’ve loved along the way, and how Core Web Vitals metrics seek to provide some stability to the picture. [Watch the Webinar]( [Film Strip] ARTICLE Addy Osmani just provides a fantastic, in-depth guide to optimizing images for Core Web Vitals in [Smashing Mag.]( [Read More]( NEW CUSTOM SCRIPT Rick Viscomi wrote a "custom metric script for WebPageTest that extracts the web app manifest for the page as a demo of the power of WPT_BODIES." See more in [in his tweet.]( Did you know you can submit your custom scripts [here](? [Custom Script Rick] API INTEGRATION SPOTLIGHT We love seeing WebPageTest data used in useful and creative ways via [the WPT API.]( Snyk's Website Vulnerability is a great example, providing visibility into security details such as HTTP security headers and vulnerable JavaScript libraries. [Scan your site's vulnerability.]( [Screen Shot 2021-05-12 at 1.36.49 PM] [logotwitter-mac] Follow WebPageTest [on Twitter]( Catchpoint, 150 West 30th Street, Suite 3, New York, New York 10001, United States [Unsubscribe]( [Manage preferences](