11 docs tagged with "Web Vitals"

Checkly is defined as: Online API to supercharge Playwright with screencap, API checks, Web Vitals, CRON Jobs, Vercel Int - 2wk trial then $30/m. Topics on: . R

CLS is defined as: Cumulative Layout Shift to measure visual stability 👍<0.1 arb. Topics on: Layout Shift, CLS should NOT measure user triggered Layout Shift -

FCP is defined as: First Contentful Paint to measure perceived load speed to see any content render on screen. Topics on: . Read more: Computer Science, Network

FID is defined as: First Input Delay for interactivity delay, 👍<100ms for best UX, from user action to browser response.. Topics on: FID is easier to remember

INP is defined as: Interaction to Next Paint to measure worst Latency for any kbd/click action on page. Topics on: . Read more: Computer Science, Network, Netwo

Layout Shift is defined as: when HTMLElement in Viewport changes position - any jitter between frames - indicate visual instability, usually unintentional - mea

LCP is defined as: Largest Contentful Paint for loading perf, 👍<2.5s & 4s>💩, ⏱ to load/render first largest element (text/img) on Viewport. Topics on: Largest

TBT is defined as: Total Blocking Time to measure t Blocking Main Thread (ΔFCP-TTI) prevent input responsiveness. Topics on: . Read more: Computer Science, Netw

TTFB is defined as: Time To First Byte - Server/CDN Latency to send first byte to Client. Topics on: . Read more: Computer Science, Network, Network Scope, Inte

TTI is defined as: Time To Interactive to measure load responsiveness when page become useable. Topics on: . Read more: Computer Science, Network, Network Scope

Web Vitals is defined as: metrics to QA test Web Page UX as LCP, FID & CLS vs 75th percentile page loads. Topics on: Replace images AVIF (bad support) > WebP >