Lighthouse 8.0 Is Here, Brings With It A New Treemap Report

This is already in PageSpeed Insights and will ship in the DevTools of Chrome 93. Here are some of the highlights:

• The Performance Score has been reweighted (#12577)
• The TBT and FCP score curves have been updated (#12576, #12556)
• CLS has been updated to its new, windowed definition (#12554)
• New metric filter. Pick a metric to focus on the opportunities and diagnostics most relevant to improving just that metric
• The Lighthouse Treemap is now available across all the major Lighthouse clients. If your site exposes source maps to Lighthouse, look for the “View Treemap” button to see a breakdown of your shipped JavaScript, filterable by size and coverage on load.