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Core Web Vitals

Focus on the metrics that matter most

Google’s Core Web Vitals are a set of metrics – Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift – that are intended to help you understand different aspects of the user experience, from rendering speed to visual stability. As a Google ranking factor, Web Vitals are key metrics for you to track.

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Web Vitals
Web Vitals Dashboard
Your Web Vitals dashboard leverages both RUM and Synthetic data to give you a snapshot of where you currently stand relative to Google’s recommended thresholds.
Distribution / Time Metrics
Distribution and Time-series Metrics
We show you each metric in both a distribution chart and a time-series chart. This helps you identify if anomalies are related to a cohort of users or to a configuration on your end.
LCP
Largest Contentful Paint Visuals
We show you the frames before and after each Largest Contentful Paint (LCP) event, as well as highlighting the LCP element. This makes it easy for you to identify and improve the element that contributes to your LCP score.
JavaScript Time
First Input Delay and JavaScript time
First Input Delay (FID) is heavily influenced by how well your JavaScript is performing. We identify all the JS running on your pages – breaking it down by domain and total time – making it easy for you to identify any poorly performing scripts.
CLS
Cumulative Layout Shift visuals
Solving CLS issues just got easier! We identify each layout shift that happens on the page and show a before-and-after frame that highlights each element that contributed to the CLS score.
Web Vitals in Action
UK Government Digital Service use SpeedCurve to track Core Web Vitals
The UK Government Digital Service (GOV.UK) uses SpeedCurve Synthetic and RUM to improve their web performance: “Using SpeedCurve we can now set a whole bunch of performance budgets and alerts that let us know, via email and Slack, when a particular threshold has been crossed in the metrics we are monitoring.”