The number of milliseconds between now and the last time data was transmitted to the client on the current connection. Both new data and retransmitted data are counted. This includes any data framed by the TCP layer such as TLS, HTTP framing, or HTTP message bodies, but it does not include TCP packets that carry only meta information (e.g., pure ACK packets).
User contributed notes
We welcome comments that add use cases, ideas, tips, and caveats. All comments will be moderated before publication. To post support questions, visit our support center and we'll find you the help you need.