The biggest surprise for me is that the Go runtime would be a good fit for Python, performance wise, considering the very different object and dispatch model.
The post also mentions runtime reflection, which used to be painfully slow last time I used it. (Go 1.5, i think).
Has this improved in the latest releases?
If you know Go or are willing to learn about Go and reflection, you can learn a lot about how dynamic languages work under the hood by implementing:
func Add(interface{}, interface{}) interface{} { ... }