Irule for getting total response time, server response time and server connection time

I've taken this concept and expanded it here:

https://devcentral.f5.com/codeshare/logging-irule-1180

This version logs millisecond timestamps, handles connections that close early, and uses a $log() array so other irules on the same vip can add fields to log. Logging request headers, response headers, country code, etc.