What is secureConnectionStart?
- The metric secureConnectionStart is the moment in time immediately before the handshake process to secure the connection.
Why measure secureConnectionStart?
The main purpose of this is to create a more precise measurement of how long the secure handshake process takes.
Establishing the secure connection time
The TCP connection has three main timestamps that browsers provide. They are connectStart, secureConnectionStart 1 and connectEnd.
If we subtract secureConnectionStart from connectEnd we will have the SSL time.
SSL time = connectEnd - secureConnectionStart
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