[{"data":1,"prerenderedAt":66},["ShallowReactive",2],{"\u002Fglossary\u002Flighthouse":3,"\u002Fglossary\u002Flighthouse:related":49},{"id":4,"title":5,"author":6,"authorImage":7,"body":8,"category":34,"date":35,"description":36,"draft":37,"extension":38,"letter":39,"meta":40,"navigation":41,"path":42,"readTime":43,"related":44,"seo":45,"stem":47,"term":5,"__hash__":48},"glossary\u002Fglossary\u002Flighthouse.md","Lighthouse","Fabian Krumbholz","\u002Fimages\u002Fauthors\u002Ffabian-krumbholz.webp",{"type":9,"value":10,"toc":30},"minimark",[11],[12,13,14,17,18,21,22,25,26,29],"p",{},[15,16,5],"strong",{}," is an open-source, automated tool from Google for auditing the quality of web pages. It runs a series of tests against a page and generates a report with scores for performance, accessibility, SEO, and other best practices. Its performance score is based on ",[15,19,20],{},"Lab Data"," and is an excellent tool for debugging and regression testing, but it should not be confused with the ",[15,23,24],{},"Field Data"," from ",[15,27,28],{},"CrUX"," that Google uses for its search ranking.",{"title":31,"searchDepth":32,"depth":32,"links":33},"",2,[],null,"April 8, 2026","Lighthouse is an open-source, automated tool from Google for auditing the quality of web pages. It runs a series of tests against a page and generates a report with scores for performance, accessib…",false,"md","L",{},true,"\u002Fglossary\u002Flighthouse","1 min read",[],{"title":46,"description":36},"Lighthouse: Definition | Web Performance Glossary","glossary\u002Flighthouse","wcPqlFNznnrHlFb2SeDNrRHV_eakt6bXASpO3g-zM_Q",[50,54,58,62],{"path":51,"title":52,"description":53,"letter":39},"\u002Fglossary\u002Flab-data-synthetic-monitoring","Lab Data (Synthetic Monitoring)","Lab data is performance data collected in a controlled, repeatable environment using tools like Google Lighthouse or WebPageTest.",{"path":55,"title":56,"description":57,"letter":39},"\u002Fglossary\u002Flargest-contentful-paint-lcp","Largest Contentful Paint (LCP)","A Core Web Vital that measures the perceived loading speed of a page. It marks the point in time when the largest content element (usually a hero image or a large block of text) becomes visible within the viewport.",{"path":59,"title":60,"description":61,"letter":39},"\u002Fglossary\u002Flargest-contentful-paint-subparts","Largest Contentful Paint Subparts","The LCP Subparts are the distinct phases that make up the total Largest Contentful Paint time. Analyzing this breakdown is crucial for diagnosing the root cause of a slow LCP.",{"path":63,"title":64,"description":65,"letter":39},"\u002Fglossary\u002Flayout-thrashing","Layout Thrashing","Layout Thrashing is a harmful performance anti-pattern.",1787756714998]