Time To First Byte

Last Modified:
Oct 3, 2023 @ 8:27 am
Tags:

Definition

Time to First Byte (TTFB) refers to the time between the browser requesting a resource (i.e., a webpage, a manifest, a video ) and when it receives the first byte of information from the server. This time includes DNS lookup and establishing the connection using a TCP handshake and  handshake if the request is made over .

TTFB is the time it takes between the start of the request and the start of the response, in milliseconds: TTFB = responseStart – navigationStart

Related Information

Version:
1
Abbreviation:
TTFB

Source

This glossary entry has been provided as-is by the following source:

Was this article helpful?
YesNo

The Streaming Video Wiki is organized and maintained by the Streaming Video Technology Alliance, a global technical association dedicated to solving the critical technical challenges of streaming high-quality video at scale. For more information about the SVTA or questions about this Wiki, please contact the SVTA.