[tor-relays] How to fully utilize resources for relay?

[Steve Snyder]

I have a machine that is dedicated to being a Tor exit node. How can I 
maximize the performance (high throughput / low latency) of Tor traffic?

I have plenty of under-utilized CPU and RAM resources on this system. 
According to TorStatus, my bandwidth is rarely maxed-out.

This is on a Linux system, currently running Tor v0.2.2.30-rc.

So... what resources can I spend to make this a better Tor node?

Thanks.