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Welcome to the Lumar Knowledge Base

Getting Started with Site Speed Metrics

Andrew Levey
  • Updated

What are the Site Speed Metrics?

We recently added site speed metrics to the Lumar platform, giving Lighthouse performance metrics at scale. This will help you speed up your websites to deliver a better experience for prospects and customers, and identify byte savings to reduce costs.

As with technical SEO and accessibility metrics, our health scores in Lumar Analyze help you quickly see which areas need addressing, and prioritize accordingly. Aggregated issues avoid data overload, and help you identify the biggest opportunities, and detailed information on how to fix issues helps you write clear acceptance criteria for dev tickets, so you can get things fixed.

Screenshot of the Site Speed Overview dashboard in Lumar Analyze, showing health scores, key performance indicators, top errors and trend lines.

Which metrics does Lumar cover?

In relation to site speed, Lumar follows Google’s Lighthouse performance reporting, which includes:

  • First Contentful Paint (FCP), which measures the time from when the user first navigated to a page, to when any part of that page’s content (text, images, <svg> elements, or non-white <canvas> elements) is rendered on the screen.
  • Largest Contentful Paint (LCP), which measures the render time of the largest image of text block visible in the viewport, relative to when the user first navigated to the page. 
  • Total Blocking Time (TBT), measuring the total amount of time after FCP where the main thread was blocked for long enough to prevent input responsiveness. Note that this also correlates well with First Input Delay (FID) which is a field metric measured in Core Web Vitals. 
  • Cumulative Layout Shift (CLS), which is the measure of the largest burst of layout shift scores for every unexpected layout shift that occurs during the entire lifecycle of a page. 
  • Speed Index Score, which measures how quickly content above the fold is visually displayed during page load. 

Ready to get started?

To get started with Lumar’s Site Speed metrics, simply fill out this form and we’ll get in touch to organize a demo. Or, if you’re an existing customer with a Customer Success Manager (CSM), feel free to reach out to them to arrange. 

One you have a Lumar account with our Lighthouse Site Speed metrics, you can get started with the following help articles: