Is the time it
took the client to send the HTTP request to the server (for example, by means
of an HTTP GET or HTTP POST). Note: This time includes TCP connection setup
time and SSL session setup time (if any). It starts when the client starts the
TCP session on the server and ends when the server receives the whole request.
Sometimes an operation is slow because of a big request rather than due to a
Response Download Time:
Unlike request time which is calculated by the AMD, Response download time is calculated by the CAS. Response download time is the time it took to transfer the response from the server to the client. The value is obtained by subtracting Request Time, Server Time and Idle Time from Page Load Time.