If you aren't using this metric, than it is a lot of overhead per packet received and disabling it for a busy statsd process has performance gains.
Would be great to add a configuration flag to enable/disable this
How much would we gain in terms of performance? Isn't that very negligible based on the amount of all the other metrics we send?
I don't think we are gaining that much from this. I think calculating a timestamp once per packet is probably less work than everything else we do.