See How to improve Largest Contentful Paint on your site. See the Lighthouse performance scoring post to learn how your page's overall performance score is calculated. This table shows how to interpret your FMP score: The FCP score would be 99, but the FMP score would be 75. If FMP occurs after FCP-for example, when a page contains iframe content-the FMP score will be lower than the FCP score.įor example, let's say your FCP is 1.5 seconds, and your FMP is 3 seconds. When FMP and FCP are the same, their scores are identical. Just like FCP, FMP is based on real website performance data from the HTTP Archive. How Lighthouse determines your FMP score # FMP registers when the content within the iframe is visible to the user, while FCP doesn't include iframe content. However, these metrics can differ when, for example, there's content above the fold within an iframe. Learn more about the technical details of FMP in Google's Time to First Meaningful Paint: a layout-based approach.įirst Contentful Paint (FCP) and FMP are often the same when the first bit of content rendered on the page includes the content above the fold.

FMP essentially shows the timing of the paint after which the biggest above-the-fold layout change happens. The raw score for FMP is the time in seconds between the user initiating the page load and the page rendering the primary above-the-fold content. Lighthouse displays FMP in seconds: What FMP measures #įMP measures when the primary content of a page is visible to the user. Each metric captures some aspect of page load speed. Moving forward, consider using Largest Contentful Paint instead.įirst Meaningful Paint (FMP) is one of six metrics tracked in the Performance section of the Lighthouse report. Additionally, the metric's definition relies on browser-specific implementation details, which means it cannot be standardized nor implemented in all web browsers. In practice FMP has been overly sensitive to small differences in the page load, leading to inconsistent (bimodal) results.

Caution: First Meaningful Paint (FMP) is deprecated in Lighthouse 6.0.

Paintbrush definition