First, significance: website performance often determines user experience, web page loading is fast enough, smooth operation is often the user’s first impression of the site, the better the performance of the site, the conversion rate, user retention rate is often better.
Maximum Contentful Paint (Largest Contentful Paint) : maximum Contentful Paint (Largest Contentful Paint) : maximum Contentful Paint (Largest Contentful Paint) 3, TTFB: the First byte of the response received 4, First Input Delay (FID) : the time of the First interaction 5, Ready: the document has been parsed 6, Load: FCP refers to the first screen time when all resources are loaded. LCP refers to the maximum chunk of a page that a user sees. Load refers to the page that is loaded.
Report and three parameters: capture report 1, the path of the above six indexes: the string url / / page 2, d1: number | undefined / / TTFB time 3, d2: Number | undefined / / FCP 4, d3: number | undefined / / LCP, d4: number | undefined / / FID 6, d5: Number | undefined / / Ready 7, d6: number | undefined / / the Load 8, the detail: the string / / duration of more than 500 ms file, an array of strings
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