Time to First Byte (TTFB)
Code received in 0.8 seconds.
Impact
(How ScanGov measures tasklist priorities.)
Why it's important
Quickly receiving code ensures faster load times and better user interaction with the site.User stories
As a user requesting a web page, I want the server to respond quickly so that the page starts loading without noticeable delay.
Error
(ScanGov messaging when a site fails a standard)
Server response took over 0.8 seconds.
About
Time to First Byte (TTFB) measures the time it takes from when a browser requests a resource to when the first byte of data begins to load. It’s an important metric for website performance, affecting how quickly a page appears. A good TTFB is under 0.8 seconds, and anything over 1.8 seconds needs improvement. TTFB is influenced by server responsiveness and connection setup time. Lowering it can improve overall user experience and speed.