在 Zite 上看到的「Implementing a Tor relay from scratch」，用 Go 寫的 Tor Relay Server。
會跳下去用 Go 寫是因為效能上的考量：
[...], but the lack of AES-NI instructions on the CPUs cause a significant slowdown.
但因為一個 IP 只能跑兩個 instance，這就有點痛了：
To maximize the amount of relayed data, it is normal to simply run multiple instances of the program, up to two per IP address.
My final goal was to beat the Tor speed record, which was at roughly 200 megabytes per second.
成果就是直接吃滿 2Gbps (250MBytes/sec)，而且 CPU 只用了 60%：
[...] He set up a server with my relay and within a few days we had broken the Tor speed record with a nice 250 megabytes per second, effectively maxing out the network link. CPU usage was at a nice 60% across 12 cores. But his relay also suffered from the memory issues and had to be restarted every few days.
作者的程式碼放在 GitHub 上，之後應該會有人跳進去改寫：「A fast implementation of the Tor OR code, in Go」。