Performance Metrics

[chernser]

Describe the bug

We need to have move insights to resolve performance issues. Metrics would help us to identify problem quicker.

Next metrics should exists

• RTT time - a time taken for whole request
• Time transferring data to server
• Time waiting for response
• Amount of bytes transferred by client (we have similar from server side)

Additionally we need to be able to gather other network diagnostic information if possible.